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DynaLastic™ 180

Description
DynaLastic 180 is a polyester reinforced SBS modified bitumen sheet. It incorporates the features of a tough, 180
g/m2 non-woven polyester mat that is saturated and coated with a blend of SBS (Styrene-Butadiene-Styrene) rubber
and high quality asphalt. The elastomeric asphalt blend has full recovery properties after 100% elongation and lends
elasticity and flexibility to the sheet. The polyester mat provides good tensile strength, toughness, puncture
resistance and can accommodate stresses created by typical roof-top expansion and contraction forces. The
covering layer of ceramic-coated roofing granules, available either in black or white, provides durability along with
superior resistance to damage from foot traffic. In addition, the white granules offer improved heat reflectivity and
resistance to temperature stress.
Use
DynaLastic 180 is designed for use as a quality modified bitumen sheet in multiple ply roofing systems. It is ideal for
low slope applications (inclines up to ½" per foot [41.6 mm/m]), and is recommended for this application with Types
III and IV asphalt. For slopes from ½" to 3" per foot (41.6 to 250 mm/m), only Type IV asphalt is recommended.
Because of its excellent weatherability, durability and handling characteristics, DynaLastic 180 may be used both as
a modified bitumen cap sheet or as a flashing material. However, we require using DynaFlex® for flashing
applications in many specifications. DynaLastic 180 may also be installed in JM MBR® Bonding Cement or JM
MBR® Cold Application Adhesive. This product is not to be installed using heat-welding application techniques.
Advantages
- The polyester mat provides excellent puncture and tear resistance
- The elongation and recovery properties of the SBS blend allow the product to easily accommodate the
continual expansion and contraction strains experienced on all roofs
- The product’s flexibility and dimensional stability provide ease of handling, resulting in quick installations
Typical Physical Properties*
Material meets or exceeds the criteria for ASTM D 6164, Type I, Grade G.
Thickness.......................................................... 0.150 inches (3.8 mm)
Tensile Strength @ 0°F (-18°C)
Machine Direction ............. 100 lbs. force/in. width (17.5 kN/m)
Cross Machine Direction .... 80 lbs. force/in. width (14.0 kN/m)
Elongation @ 0°F (-18°C)
Machine Direction ............................................................... 35%
Cross Machine Direction ................................................... 35%
Tensile-Tear
Machine Direction ...............................100 lbs./in. (17.5 kN/m)
Cross Machine Direction.......................80 lbs./in. (14.0 kN/m)
Low Temperature Flexibility ........................................-10°F (-23°C)
Dimensional Stability
Machine Direction .......................................................0.70% change
Cross Machine Direction ............................................0.60% change
* Material tested in accordance with ASTM D 5147 Standard Test Method for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size .................................................... 1 square (9.29 m2)
Roll weight ................................................... 101 lbs (45.8 kg)
Roll length ......................................................... 32' 10" (10 m)
Roll width .............................................................. 39 3/8" (1 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4106.
DynaLastic™ 180 FR

Description
DynaLastic 180 FR is a fire resistant, polyester reinforced, SBS modified bitumen sheet. It incorporates the features
of a tough 180 g/m2 non-woven polyester mat that is saturated and coated with a blend of SBS
(Styrene-Butadiene-Styrene) rubber, high quality asphalt and fire-retardant additives. The elastomeric asphalt blend
has full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet. The polyester mat
provides good tensile strength, toughness, puncture resistance and can accommodate stresses created by typical
rooftop expansion and contraction forces. The covering layer of ceramic-coated roofing granules, available either in
black or white, provides durability along with superior resistance to damage from foot traffic. In addition, the white
granules offer improved heat reflectivity and resistance to temperature stress.
Use
DynaLastic 180 FR is designed for use as a quality modified bitumen sheet in UL fire rated, multiple ply roofing
systems. It is ideal for low slope applications (inclines up to ½" per foot [41.6 mm/m]), and is recommended for this
application with Types III and IV asphalt. For slopes from ½" to 3" per foot (41.6 to 250 mm/m), only Type IV asphalt
is recommended. DynaLastic 180 FR may also be installed in JM MBR® Bonding Cement or JM MBR® Cold
Application Adhesive. Because of its excellent weatherability, durability and handling characteristics, DynaLastic
180 FR may be used both as a modified bitumen cap sheet or as a flashing material. However, we require using
DynaFlex® for flashing applications in many specifications. This product is not to be installed using heat-welding
application techniques.
Advantages
- The polyester mat provides excellent puncture and tear resistance
- The elongation and recovery properties of the SBS blend allow the product to easily accommodate the
continual expansion and contraction strains experienced on all roofs
- The product’s flexibility and dimensional stability provide ease of handling, resulting in quick installations
- Fire-retardant formulation
Typical Physical Properties*
Material meets or exceeds the criteria for ASTM D 6164, Type I, Grade G.
Thickness........................................................ 0.150 inches (3.8 mm)
Tensile Strength @ 0°F (-18°C)
Machine Direction ............. 100 lbs. force/in. width (17.5 kN/m)
Cross Machine Direction .... 80 lbs. force/in. width (14.0 kN/m)
Elongation @ 0°F (-18°C)
Machine Direction .............................................................. 35%
Cross Machine Direction ................................................... 35%
Tensile-Tear
Machine Direction................................ 100 lbs./in. (17.5 kN/m)
Cross Machine Direction ...................... 80 lbs./in. (14.0 kN/m)
Low Temperature Flexibility .......................................... -10°F (-23°C)
Dimensional Stability
Machine Direction ............................................... 0.70% change
Cross Machine Direction..................................... 0.60% change
* Material tested in accordance with ASTM D 5147 Standard Test Method for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size .................................................. 1 square (9.29 m2)
Roll weight ................................................. 101 lbs (45.8 kg)
Roll length ....................................................... 32' 10" (10 m)
Roll width ............................................................ 39 3/8" (1 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4107.
DynaLastic® 180 S

Description
DynaLastic 180 S is an elastomeric modified bitumen sheet. It incorporates the features of a tough, 180 g/m2
non-woven, polyester mat that is saturated and coated with a blend of SBS (Styrene-Butadiene-Styrene) polymer
and high quality asphalt. The elastomeric asphalt blend has full recovery properties after 100% elongation and lends
a high degree of elasticity and flexibility to the sheet. The polyester mat provides good tensile strength, toughness,
puncture resistance and can accommodate stresses created by typical rooftop expansion and contraction forces.
This product does not have a surface finish and must be used in constructions that will provide protection from UV
(ultraviolet light) and the elements. A fine material parting agent is applied to both sides of the product.
Use
DynaLastic 180 S is designed for use as a top modified bitumen sheet in multiple-ply roof systems where additional
surface treatment is required, i.e. Protected Roof Membranes, systems surfaced with asphalt and gravel or
protective coatings. It may also be used as a base or ply sheet in certain constructions. It is ideal for low slope
applications (inclines up to ½ " per foot [41.6 mm/m]), and is recommended for this application with Types III and IV
asphalt. For slopes from ½" to 3" per foot (41.6 to 250 mm/m), only Type IV asphalt is recommended. DynaLastic
180 S may also be installed in JM MBR® Bonding Cement or JM MBR® Cold Application Adhesive. This product is
not to be installed using heat-welding application techniques.
Advantages
- The polyester mat provides excellent puncture and tear resistance
- The elongation and recovery properties of the SBS blend allow the product to easily accommodate the
continual expansion and contraction strains experienced on all roofs
- The product’s flexibility provides for ease of handling and quick installation
Typical Physical Properties*
Material meets or exceeds the criteria for ASTM D 6164, Type I, Grade S.
Thickness ........................................................ 0.118 inches (3.0 mm)
Tensile Strength @ 0°F (-18 °C)
Machine Direction ............ 100 lbs. force/in. width (17.5 kN/m)
Cross Machine Direction ... 80 lbs. force/in. width (14.0 kN/m)
Elongation @ 0°F (-18 °C)
Machine Direction ............................................................. 35%
Cross Machine Direction .................................................. 35%
Tensile-Tear
Machine Direction .............................. 100 lbs./in. (17.5 kN/m)
Cross Machine Direction ..................... 80 lbs./in. (14.0 kN/m)
Low Temperature Flexibility ......................................... -10°F (-23°C)
Dimensional Stability
Machine Direction .............................................. 0.70% change
Cross Machine Direction ................................... 0.60% change
* Material tested in accordance with ASTM D 5147 Standard Test Method for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size .............................................. 1 square (9.29 m2)
Roll weight ............................................... 90 lbs (38.6 kg)
Roll length ............................................... 32' 10" (10.0 m)
Roll width .................................................... 39 3/8" (1.0 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4108.
DynaLastic™ 250

Description
DynaLastic 250 is a polyester reinforced SBS modified bitumen sheet. It incorporates the features of a tough, 250
g/m2 non-woven polyester mat that is saturated and coated with a blend of SBS (Styrene-Butadiene-Styrene) rubber
and high quality asphalt. The elastomeric asphalt blend has full recovery properties after 100% elongation and lends
elasticity and flexibility to the sheet. The polyester mat provides excellent tensile strength, toughness, puncture
resistance and can accommodate stresses created by typical rooftop expansion and contraction forces. The
covering layer of ceramic-coated roofing granules, available either in black or white, provides durability along with
superior resistance to damage from foot traffic. In addition, the white granules offer improved heat reflectivity and
resistance to temperature stress.
Use
DynaLastic 250 is designed for use as a quality modified bitumen sheet in multiple ply roofing systems. It is ideal for
low slope applications (inclines up to ½ " per foot [41.6 mm/m]), and is recommended for this application with Types
III and IV asphalt. For slopes from ½" to 3" per foot (41.6 to 250 mm/m), only Type IV asphalt is recommended.
Because of its excellent weatherability, durability and handling characteristics, DynaLastic 250 may be used both as
a modified bitumen cap sheet or as a flashing material. However, we require using DynaFlex® for flashing
applications in many specifications. DynaLastic 250 may also be installed in JM MBR® Bonding Cement or JM
MBR® Cold Application Adhesive. This product is not to be installed using heat-welding application techniques.
Advantages
- The polyester mat provides superior puncture and tear resistance
- The elongation and recovery properties of the SBS blend allow the product to easily accommodate the
continual expansion and contraction strains experienced on all roofs
- The product’s flexibility and dimensional stability provide ease of handling, resulting in quick installations
Typical Physical Properties*
Material meets or exceeds the criteria for ASTM D 6164, Type II, Grade G.
Thickness..................................................... 0.158 inches (4.0 mm)
Tensile Strength @ 0°F (-18°C)
Machine Direction ............. 150 lbs. force/in. width (26.3 kN/m)
Cross Machine Direction .. 115 lbs. force/in. width (20.1 kN/m)
Elongation @ 0°F (-18°C)
Machine Direction .......................................................... 45%
Cross Machine Direction ............................................... 45%
Tensile-Tear
Machine Direction............................ 170 lbs./in. (29.8 kN/m)
Cross Machine Direction ................ 120 lbs./in. (21.0 kN/m)
Low Temperature Flexibility ..................................... -10°F (-23°C)
Dimensional Stability
Machine Direction .......................................... 0.70% change
Cross Machine Direction................................ 0.30% change
* Material tested in accordance with ASTM D 5147 Standard Test Method for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size ........................................................................ 1 square (9.29 m2)
Roll weight ...................................................................... 114 lbs (51.8 kg)
Roll length ............................................................................ 32' 10" (10 m)
Roll width ..................................................................................39 3/8" (1 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4109.
DynaLastic™ 250 FR

Description
DynaLastic 250 FR is a fire resistant polyester reinforced SBS modified bitumen sheet. It incorporates the features
of a tough, 250 g/m2 non-woven polyester mat that is saturated and coated with a blend of SBS
(Styrene-Butadiene-Styrene) rubber, high quality asphalt and fire-retardant additives. The elastomeric asphalt blend
has full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet. The polyester mat
provides excellent tensile strength, toughness, puncture resistance and can accommodate stresses created by
typical rooftop expansion and contraction forces. The covering layer of ceramic-coated roofing granules, available
either in black or white, provides durability along with superior resistance to damage from foot traffic. In addition, the
white granules offer improved heat reflectivity and resistance to temperature stress.
Use
DynaLastic 250 FR is designed for use as a quality modified bitumen sheet in UL fire rated, multiple ply roofing
systems. DynaLastic 250 FR has UL Class A ratings in numerous constructions, without the use of additional
coatings. It is ideal for low slope applications (inclines up to ½" per foot [41.6 mm/m]), and is recommended for this
application with Types III and IV asphalt. For slopes from ½" to 3" per foot (41.6 to 250 mm/m), only Type IV asphalt
is recommended. Because of its excellent weatherability, durability and handling characteristics, DynaLastic 250
FR may be used both as a modified bitumen cap sheet or as a flashing material. However, we require using
DynaFlex® for flashing applications in many specifications. DynaLastic 250 FR may also be installed in JM MBR®
Bonding Cement or JM MBR® Cold Application Adhesive. This product is not to be installed using heat-welding
application techniques.
Advantages
- The polyester mat provides superior puncture and tear resistance
- The elongation and recovery properties of the SBS blend allow the product to easily accommodate the
continual expansion and contraction strains experienced on all roofs
- The product’s flexibility and dimensional stability provide ease of handling, resulting in quick installations
- Fire-retardant formulation
Typical Physical Properties*
Material meets or exceeds the criteria for ASTM D 6164, Type II, Grade G.
Thickness ......................................................... 0.158 inches (4.0 mm)
Tensile Strength @ 0°F (-18°C)
Machine Direction ............ 150 lbs. force/in. width (26.3 kN/m)
Cross Machine Direction.. 115 lbs. force/in. width (20.1 kN/m)
Elongation @ 0°F (-18°C)
Machine Direction ............................................................... 45%
Cross Machine Direction .................................................... 45%
Tensile-Tear
Machine Direction................................. 170 lbs./in. (29.8 kN/m)
Cross Machine Direction ..................... 120 lbs./in. (21.0 kN/m)
Low Temperature Flexibility .......................................... -10°C (-23°F)
Dimensional Stability
Machine Direction ................................................ 0.70% change
Cross Machine Direction...................................... 0.30% change
* Material tested in accordance with ASTM D 5147 Standard Test Method for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size ............................................................. 1 square (9.29 m2)
Roll weight .......................................................... 115 lbs (51.75 kg)
Roll length .................................................................. 32' 10" (10 m)
Roll width ....................................................................... 39 3/8" (1 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4110.
DynaBase®

Description
DynaBase is a modified bitumen sheet incorporating the features of a medium weight fiber glass mat with a blend of
SBS (Styrene-Butadiene-Styrene) rubber and high quality asphalt. This elastomeric asphaltic blend has full recovery
properties after 100% elongation and lends elasticity and flexibility to the sheet. The inorganic fiber glass reinforcing
provides high tensile strength, dimensional stability and tear resistance. DynaBase is designed for use in roofing
systems where two or more plies of modified bitumen are desired.
Use
DynaBase is used in multiple-ply modified bitumen membranes. It may be used as the base ply when installed over
a JM Roofing Systems insulation. It may also be used as a base/ply sheet over insulated systems employing a
traditional fiber glass ply felt or over nailable substrates with or without a standard fiber glass base felt, such as
GlasBase. DynaBase may be installed in hot Type III or IV asphalt, JM MBR® Bonding Cement or JM MBR® Cold
Application Adhesive. This product is not to be installed using heat-welding application techniques.
Advantages
- The fiber glass mat provides excellent tensile strength and puncture resistance
- The elongation and recovery properties allow the product to easily accommodate the continual expansion and
contraction strains experienced on all roofs
- The product’s flexibility and dimensional stability provide ease of handling, resulting in quick installations
Typical Physical Properties*
Thickness ....................................................... 0.090 inches (2.2 mm)
Tensile Strength @ 0°F (-18°C)
Machine Direction............... 90 Ibs. force/in. width (15.8 kN/m)
Cross Machine Direction ... 70 Ibs. force/in. width (12.3 kN/m)
Elongation @ 0°F (-18°C)
Machine Direction .............................................................. 4.0%
Cross Machine Direction.................................................... 4.0%
Tensile-Tear
Machine Direction ............................... 100 Ibs./in. (17.5 kN/m)
Cross Machine Direction....................... 90 Ibs./in. (15.8 kN/m)
Low Temperature Flexibility .......................................... -10°F (-21°C)
Dimensional Stability
Machine Direction ................................................ 0.20% change
Cross Machine Direction...................................... 0.20% change
* Material tested in accordance with ASTM D 5147 Standard Test Methods for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size ..................................................... 1½ squares (13.9 m2)
Roll weight............................................................ 90 Ibs (40.8 kg)
Roll length ................................................................. 49' 2" (15 m)
Roll width .................................................................... 39 3/8" (1 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4111.
DynaFlex®

Description
DynaFlex is a premium elastomeric, modified bitumen flashing sheet incorporating a strong, flexible fiber
glass/polyester composite mat in a blend of SBS (Styrene-Butadiene-Styrene) rubber and high quality asphalt. This
elastomeric, asphaltic blend product has excellent weathering and elongation recovery properties. The
elastomeric-based asphalt in the flashing has full recovery properties after 100% elongation and lends elasticity and
flexibility to the product.
The inorganic fiber glass reinforcement, in conjunction with the polyester, provides stability, toughness and flexibility
to DynaFlex and resists moisture absorption. The reinforcement also provides high tensile strength and affords
better resistance to the factors which affect flashing performance. The covering layer of ceramic-coated roofing
granules provides durability along with superior resistance to damage from weather. White granule products also
provide heat reflectance.
Use
DynaFlex is engineered for use as a premium base flashing with SBS modified bitumen and traditional built-up
roofing membranes. DynaFlex is protected with factory-applied roofing granules and does not require any
additional surfacing. DynaFlex can be used on all traditional flashing details and membrane terminations. Its
flexibility and conformability make it ideal for use on parapet walls, skylights, roof penetrations, drains, vents and
roof edges. DynaFlex should be installed with Type III or IV asphalt, at a temperature of 400°F (204°C) or at the
EVT, whichever is higher, and mechanically fastened as prescribed in the installation specifi-cations. DynaFlex may
also be installed using JM MBR® Flashing Cement or JM MBR® Utility Cement.
Advantages
- Superior composite reinforcement
- Excellent elongation recovery properties
- Exceptional weatherability
- Conformable to flashing substrates
- Flexible and dimensionally stable
Typical Physical Properties
Thickness.......................................................... 0.158 inches (4 mm)
Tensile Strength @ 0°F (-18°C)
Machine Direction ............ 190 Ibs. force/in. width (33.3 kN/m)
Cross Machine Direction.. 150 Ibs. force/in. width (26.3 kN/m)
Elongation @ 0°F (-18°C)
Machine Direction ................................................................ 4.0%
Cross Machine Direction ..................................................... 4.0%
Tensile-Tear
Machine Direction .................................. 225 Ibs./in. (39.4 kN/m)
Cross Machine Direction ....................... 200 Ibs./in. (35.0 kN/m)
Low Temperature Flexibility.............................................. -10°F (-23°C)
Dimensional Stability
Machine Direction .................................................. 0.20% change
Cross Machine Direction ....................................... 0.20% change
* Material tested in accordance with ASTM D 5147 Standard Test Methods for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size ............................................................... 75 sq. ft. (7.0 m2)
Roll weight ............................................................. 82 lbs (37.2 kg)
Roll length ................................................................ 25' 0" (7.63 m)
Roll width ..................................................................... 36" (0.91 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4112.
DynaClad™

Description
DynaClad is an aluminum foil surfaced, elastomeric, modified bitumen membrane. It incorporates the features of a
woven fiber glass reinforcement that is saturated and coated with a blend of SBS (Styrene-Butadiene-Styrene)
polymer and high quality asphalt. The elastomeric asphalt blend has full recovery properties after 100% elongation
and lends elasticity and flexibility to the sheet. DynaClad has a construction that provides an extremely durable
sheet with excellent weathering properties. The elastomeric asphalt blend is formulated to provide excellent physical
properties for ease of installation and long-term roof performance. The inorganic fiber glass reinforcement provides
high tensile strength, stability and toughness to the product. The covering layer of embossed aluminum foil provides
durability along with superior resistance to damage from weather and foot traffic. The back of the sheet has a
polyolefin film for ease of heat welding.
Use
DynaClad is designed for use as a premium, modified bitumen sheet either as a cap sheet or as a flashing
membrane. As a flashing material, DynaClad is installed in a two-ply system over a base layer of DynaBase. UL
Class A ratings may be obtained in numerous constructions for both new and reroof up to unlimited slope.
DynaClad may only be installed using heat-welding application techniques.
Advantages
- The woven fiber glass reinforcement mat provides good tensile properties, dimensional stability, puncture and
tear resistance
- The premium quality SBS blend allows for excellent weathering characteristics
- The embossed aluminum foil surface provides high heat reflectance, reducing heat load on the roof membrane
and potentially lowering air conditioning energy costs. An embossed copper foil is also available.
- The product’s flexibility provides for ease of handling and quick installation
Typical Physical Properties*
Thickness ......................................................... 0.158 inches (4.0 mm)
Tensile Strength @ 0°F (-18 °C)
Machine Direction .............. 185 lbs. force/in. width (32.4 kN/m)
Cross Machine Direction ....175 lbs. force/in. width (30.6 kN/m)
Elongation @ 0°F (-18 °C)
Machine Direction .................................................................... 4%
Cross Machine Direction ........................................................ 4%
Tensile-Tear
Machine Direction ................................. 185 lbs./in. (32.4 kN/m)
Cross Machine Direction ...................... 185 lbs./in. (32.4 kN/m)
Low Temperature Flexibility ............................................... 5°F (-15°C)
Dimensional Stability
Machine Direction ................................................. 0.20% change
Cross Machine Direction ...................................... 0.20% change
* Material tested in accordance with ASTM D 5147 Standard Test Method for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size ........................................................... 1 square (9.29 m2 )
Roll weight ............................................................. 101 lbs (45.8 kg)
Roll length .................................................................. 33' 6" (10.2 m)
Roll width ......................................................................39 3/8" (1.0 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4116.
SBS 170

Description
SBS 170 is a polyester reinforced SBS modified bitumen sheet. It incorporates the features of a 180 g/m2,
nonwoven, polyester mat that is saturated and coated with a blend of SBS (Styrene-Butadiene-Styrene) rubber and
high quality asphalt. The elastomeric asphalt blend has full recovery properties after 100% elongation and lends a
high degree of elasticity and flexibility to the sheet. The polyester mat provides good tensile strength, toughness,
puncture resistance and can accommodate stresses created by typical rooftop expansion and contraction forces.
The covering layer of ceramic-coated roofing granules, available in several standard colors, provides durability
along with superior resistance to foot traffic. In addition, white granules offer improved heat reflectivity and
resistance to temperature stress.
Use
SBS 170 is designed for use as a modified bitumen cap sheet in multiple-ply roofing systems. It is ideal for
low-slope applications (inclines up to ½" per foot [41.6 mm/m]), and is recommended for this application with Types
III and IV asphalt. For slopes from ½" to 3" per foot (41.6 to 250 mm/m), only Type IV asphalt is recommended. SBS
170 may also be installed in JM MBR® Bonding Cement or JM MBR® Cold Application Adhesive. This product is not
to be installed using heat-welding application techniques.
Advantages
- The polyester mat provides good puncture and tear resistance
- The product’s flexibility provides for ease of handling and quick installation
Typical Physical Properties*
Thickness ...................................................... 0.145 inches (3.7 mm)
Tensile Strength @ 0°F (-18 °C)
Machine Direction .............. 90 lbs. force/in. width (15.8 kN/m)
Cross Machine Direction .. 70 lbs. force/in. width (12.3 kN/m)
Elongation @ 0°F (-18 °C)
Machine Direction ................................................................ 30%
Cross Machine Direction ..................................................... 30%
Tensile-Tear
Machine Direction ..................................... 90 lbf/in. (15.8 kN/m)
Cross Machine Direction ......................... 70 lbf/in. (12.3 kN/m)
Low Temperature Flexibility ............................................. -5°F (-21°C)
Dimensional Stability
Machine Direction ................................................ 0.90% change
Cross Machine Direction ..................................... 0.80% change
* Material tested in accordance with ASTM D 5147 Standard Test Method for Sampling and Testing Modified
Bituminous Sheet Materials.
Sizes
Roll size ............................................................ 1 square (9.29 m2)
Roll weight ............................................................. 90 lbs (40.8 kg)
Roll length ............................................................. 32' 10" (10.0 m)
Roll width ...................................................................39 3/8" (1.0 m)

Refer to the Material Safety Data Sheet and Product Label prior to using this product. For an identical copy of this
data sheet ask for RS-4115.
MBR® Flashing Cement

Description
MBR Flashing Cement is a unique, two component, elastomeric, cold application adhesive, consisting of an asphalt
base material and an activator. It has been formulated for use with the Johns Manville (JM) SBS modified bitumen
membrane products. MBR Flashing Cement cures to form a durable elastomeric film and forms exceptional bonds
between the modified bitumens and the underlying substrate. The properties of this product complement those of
DynaFlex, an elastomeric flashing material. The resulting system has superior flexibility, durability and resistance to
virtually all of the factors affecting base flashing performance, compared to systems using traditional hot asphalt as
the adhesive.
Use
Since it can be used as a direct substitute for hot asphalt, MBR Flashing Cement is ideal for those applications
where hot asphalt is prohibited, not desirable or not practical. The adhesive is mixed on site, applied by trowel to
the substrate, and the DynaFlex is laid into the bed of adhesive. The adhesive will set within 20 to 40 minutes,
holding the modified bitumen in place, and will cure in 2 to 4 hours into a tough, durable and highly weatherable
rubber film. All modified bitumen sheet laps should be treated with the adhesive.
Advantages
- Cures to a durable, elastomeric film and forms exceptional bonds between the modified bitumens and
underlying substrate
- Resists virtually all factors affecting base flashing performance while providing superior flexibility and durability
- Can be used as a direct substitute for hot asphalt
- Ideal for areas where hot asphalt is prohibited, not desirable or not practical
! Important !
The activator must be stored indoors in an area maintained above 60°F (16°C) or crystallization will
occur. To correct this situation, the product must be warmed. Refer to the package label for the precise
procedures.
Warning: Avoid contact with skin: Use impervious clothing and rubber gloves to avoid prolonged or
repeated contact with skin. If operating conditions create high airborne concentrations, the use of a
NIOSH air-supplied respirator is required, or provide adequate ventilation. Use tight and well-sealed
goggles or a face shield and safety glasses. Keep containers closed when not in use.
! Caution !
JM MBR Cement products are significantly different from the adhesive materials used for built-up
roofing. They require the mechanic to use a great deal more care since these adhesives are prepared
on the job site. Roofing contractors must advise their crews to precisely follow all safety, storage,
handling, preparation and application instructions. JM will not accept responsibility for any use of these
products that does not comply with the instructions printed on the Flashing Cement Base container.
MBR Flashing Cement Base is flammable and may cause eye, skin and respiratory irritation. Read container label
and follow all safety instructions. Refer to the JM Material Safety Data Sheet. MBR Cement Activator vapors are
harmful and will cause irritation to respiratory system if inhaled and may cause an allergic reaction.
Read container label and follow all safety instructions. Refer to the JM Material Safety Data Sheet. |
Equipment
The following equipment is necessary for the safe and efficient preparation and application of MBR Flashing
Cement.
Safety and Personal Hygiene Equipment:
The following items should be available for, and used by, every worker:
1. Impervious rubber gloves, 1 pair for each person.
2. Rubber or plastic apron, 1 for every person mixing.
3. Organic cartridge respirator, 1 for each person.
4. Chemical safety goggles, 1 for each person mixing.
5. Soap and water.
6. Hand cleaner.
7. Supply of clean rags.
8. Solvent: paint thinner or mineral spirits.
9. Portable fire extinguisher.
10. Squeeze bottle filled with clean water for use as eye wash.
These items may be required at the job site to protect the installation and surrounding areas during application.
1. Heavy wrapping paper or suitable protective sheeting.
2. 2" (51 mm) wide masking tape.
Mechanical Equipment: Some of the items listed below are optional.
Mixing Equipment
1. Jiffy Mixer, Model PS.
2. ½" (13 mm) electric drill motor and power source.
3. Plastic graduated container for measuring activator and base material.
Application Equipment
1. Trowels.
2. Clean 5 gallon (18.9 liter) metal pails.
3. Solvent: paint thinner or mineral spirits.
4. All tools normally used in the application of BUR flashing materials.
Application of Flashing
Adhesive Preparation: The adhesive is prepared in the MBR Cement Base shipping container, a 5 gallon (18.9
liter) pail, using a Jiffy Mixer, Model PS, mounted on a ½" (13 mm) minimum drill motor. MBR Cement Activator is
packaged in pre-measured bottles with the exact amount of material necessary to react with the contents of the
MBR Flashing Cement Base pail—4 gallons (15.1 liters). To produce a complete mix, the MBR Cement Activator
must be poured slowly into the vortex caused by the rotating mixer.
THE ACTIVATOR MUST NOT BE DUMPED INTO THE PAIL IN ONE MOTION.
The mixer should be constantly moved about the pail in an up-and-down and side-to-side motion.
THE MIX IS COMPLETE IN THREE (3) MINUTES. THE BATCH MUST NOT BE OVER MIXED.
The pot life is dependent on the ambient temperature; extremes in temperature can shorten the pot life of the mix.
The mechanic will have to use the mixed material in approximately:
Temp. (°F) |
50 |
60 |
70 |
80 |
90 |
100 |
(°C) |
10 |
16 |
21 |
27 |
32 |
38 |
|
Minutes |
20 |
25 |
30 |
30 |
30 |
25 |
The mixing of individual pails of adhesive must be timed so that only one can of freshly mixed adhesive is ready for
each application crew. In cold weather, the material must be stored and mixed at room temperature.
Important: The MBR Cement Activator must be stored indoors in an area maintained above 60°F (16°C) or
crystallization will occur. Refer to the package label on how to correct this situation should it occur.
MIXED ADHESIVE MUST NOT BE STOCKPILED, SINCE THE MATERIAL WILL CURE TO AN
UNWORKABLE CONSISTENCY!
Mixed material is spread on the substrate to be flashed with a trowel to obtain a full coverage coating, without voids,
to a minimum thickness of 1/16" (1.6 mm). As the coating process proceeds, the DynaFlex flashing is laid into the
bed of cement. Check all flashing details to determine if there is a nailing requirement. Side laps are sealed with
the same flashing cement and should be a minimum of 4" (102 mm). Approximately 4 gallons (15.1 liters) of MBR
Flashing Cement are required to cover 100 sq. ft. (9.29 m2) with a nominal 1/16" (1.6 mm) thick layer of adhesive.
When flashing to sheet metal, JM Metal Primer is required and should be applied as prescribed on the
primer label.
MBR Flashing Cement bonds very well to clean, dry, well-cured concrete. However, concrete cured with mineral oils,
resins or waxes will require the use of JM Concrete Primer. In addition, concrete soiled with oil, grease, or form
release agents must be thoroughly cleaned and coated with JM Concrete Primer, following the instructions on the
pail.
Clean Up
Mineral spirits should be used to clean tools immediately after completion of work. Tools should also be placed in
mineral spirits in a pail periodically to prevent build up of cement. Rubber gloves must be worn during all
applications and clean up procedures. Follow manufacturer's warnings/cautions about using solvents.
Disposal Information: MBR Flashing Cement, i.e., MBR Flashing Cement Base that has been fully reacted with
MBR Cement Activator, can usually be disposed of at a licensed landfill. MBR Flashing Cement Base is
considered a hazardous waste. Disposal must be in accordance with local, state and federal regulations. If
possible, fully react any remaining material with MBR Cement Activator; this reacted material can usually be
disposed of at a licensed landfill. MBR Cement Activator is also considered a hazardous waste. Disposal must be
in accordance with local, state and federal regulations. If the material is reacted with one of the MBR Cement Bases,
disposal can be as recommended for MBR Flashing Cement. If this is not the case, the material can be neutralized
using a 90% water, 8% ammonia and 2% detergent solution. Containers must be left open for at least 48 hours to
allow any CO2 gas evolved to escape. The resulting solidified waste can then usually be disposed of at a licensed
landfill.
Empty Containers: MBR Flashing Cement Base containers, when empty, contain combustible and harmful vapors
and residue. Do not reuse the container or remove the labels. Follow all of the label warnings even when the
container is empty. Disposal of container should be in accordance with applicable regulations. If the residue is of
fully reacted material, the container can usually be disposed of at a licensed landfill . MBR Cement Activator
containers should be neutralized with the solution described in the disposal information above. Decontaminated
containers must be left open for at least 48 hours to allow any CO2 gas evolved to escape. Containers can then be
disposed of at a licensed landfill.