Products - Page 6

MBR^® Bonding Cement

Description

MBR Bonding 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 Johns Manville (JM) SBS modified bitumen membrane products. MBR Bonding 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 the JM SBS family of modified bitumens. The resulting membranes have superior flexibility, durability and resistance to virtually all of the factors affecting roof performance.

Use

Since it can be used as a direct substitute for hot asphalt, MBR Bonding Cement is ideal for those applications where hot asphalt is prohibited, not desirable or not practical.  In this system, the adhesive is mixed on site and applied by squeegee or spray techniques to Fesco, Fesco Foam, E’NRG’Y 2, Fiber Glass Roof Insulation or an approved substrate. One of the JM base sheets is then laid into the adhesive or over a nailed base sheet. Subsequently, one of the JM modified bitumen sheets is laid into a bed of adhesive. Partially adhered specifications are not permitted with this material. 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 are also treated with the adhesive.

Advantages

• Cures to a durable, elastomeric film and forms exceptional bonds between the modified bitumen sheets and the underlying substrate
• Resists all factors affecting the membrane performance while providing superior flexibility and durability
• Can be used as a direct substitute for asphalt
• Ideal for areas where hot asphalt is prohibited, not desirable or not practical

Equipment

The following equipment is necessary for the safe and efficient preparation and application of MBR Bonding 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 spraying); air-supplied respirators may be required for some applications.
4. Chemical safety goggles, 1 for each person mixing or spraying.
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, depending on whether squeegee or spray application is used.

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. ³/16" (5 mm) saw tooth squeegee.
2. Binks "Hawk 4L" Spray Unit to fit 5 gallon (18.9 liter) pail and Type 7E2 spray gun with 47 x 1/4 nozzle with 25' (7.6 m) of ³/4" (19 mm) fluid hose and 25' (7.6 m) of ³/8" (10 mm) air hose.
3. 125 cfm (3.54 cmm), 100 psi (690 kPa) air compressor and hose.
4. Clean 5 gallon (18.9 liter) metal pails.
5. Solvent: paint thinner or mineral spirits.
6. All tools normally used in the application of BUR roofing materials.

Application of Membrane
Adhesive Preparation:
MBR Bonding Cement is prepared on site by adding specific amounts of MBR Cement Activator to MBR Bonding Cement Base and mixing thoroughly. The adhesive is prepared in the MBR Bonding Cement Base shipping container, a 6 gallon (22.7 liter) pail, with the use of a Jiffy Mixer mounted on a ½" (13 mm) electric drill motor. The container of MBR Cement Activator is packaged to provide exactly the correct amount of material necessary to react with the contents of the MBR Bonding Cement Base pail—4½ gallons (17.0 Iiters). The activator is heavier and has a lower viscosity than the base material.   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 adhesive has a pot life that is dependent on the ambient temperature.  The mechanic will have to use the mixed material in approximately:

The mixing of individual pails of adhesive should be timed so that one can of freshly mixed material is ready for the application crew.  Mixed adhesive must not be stockpiled, since the material may cure to an unworkable viscosity before the application crew can use it.  Although not recommended, mixing of quantities smaller than a full pail may be required. Using a clean container, mix the MBR Bonding Cement Base and MBR Cement Activator using exactly the following ratios:

Substrates: The surface on which the modified bitumen membrane is to be applied should be one of the JM roof insulations (Fesco, Fesco Foam, E’NRG’Y 2 or ½" [13 mm] Retro-Fit Board) or an approved substrate. Poured and pre-cast concrete require priming with JM Concrete Primer. The primer must be completely dry before adhesive application begins. The finished surface must be clean, dry and smooth.

Base Ply Over Non-Nailable Decks: The simplest way to apply the adhesive is by pouring the mixed adhesive on the substrate and spreading it with a ³/16" (5 mm) or maximum ¼" (6 mm) saw toothed squeegee. The same techniques that are outlined in the following sections are applicable to both the base sheets and modified bitumen cap sheets.  Starting at the low edge of the roof, the mixed adhesive is poured from the pail along the lay of the first sheet, an 18" (457 mm) wide layer of PermaPly^® 28, GlasBase™, GlasBase™ Plus or DynaBase™

.NOTE: Do not use GlasPly IV or GlasPly Premier in any cold adhesive system. The adhesive is spread along the roof in a width slightly wider than the sheet. The felt is then rolled, scrolled or flopped into the adhesive bed. The sheet must be firmly and uniformly set, without voids, into the adhesive. The sheet may be positioned and straightened once it is completely laid out. The end 4" (102 mm) of the sheets are coated with adhesive to form an end lap. The spreading of the adhesive is continued along the roof. The next sheet is put down, as before, covering the 4" (102 mm) area coated with adhesive, forming the end lap and seal.

The adhesive is applied at a nominal rate of 1.0 gallon per square (0.41 liters/m² ) over non-porous substrates, e.g., primed concrete.  If over insulation or porous substrates, the application rate will increase to approximately 2.0 gallons per square (0.82 liters/m² ) or more depending on the absorbency of the material.  Upon complete application of the first course, the second and succeeding courses are applied in the same manner as before. The adhesive is spread onto the lower course in the selvage edge area to seal the side laps. It is good practice to offset the end laps.  Nailers are required on inclines ½" per foot (41.6 mm/m) or more with felts run parallel to the incline. Nails must have a 1" (25 mm) minimum diameter cap. Locate one nail at each nailer in the leading edge of the JM base ply. Make sure that each nail is covered by the succeeding layer.  Wood nailers are to be installed perpendicular to the slope, spaced approximately as follows:

Inclines: ½"-2" per ft. (41.6-166.6 mm/m);
28' (8.5 m) o.c.

Inclines: 2"-3" per ft. (166.6-249.8 mm/m);
14' (4.3 m) o.c.

Base Felt Over Nailable Decks: Over nailable decks, either PermaPly 28, GlasBase, GlasBase Plus, DynaBase or Ventsulation must be used. Ventsulation is recommended over lightweight fill decks.  Starting at the low edge, apply one 18" (457 mm) wide layer of DynaBase, Ventsulation, PermaPly 28, GlasBase or GlasBase Plus. The following felts are to be applied full width, lapping 3" (76 mm) over the preceding one. Nail the lap on 9" (229 mm) centers, and, down the longitudinal center of each felt, place two rows of nails.  The rows should be 11" (279 mm) apart with the nails staggered on approximately 18" (457 mm) centers. Use nails or fasteners appropriate to the type of deck. All fasteners are to be driven through caps unless the fastener has an integral cap no less than 1" (25 mm) across. On lightweight fill decks, a minimum fastener pullout should be 40 Ibs. (178 N).   For slopes greater than ½" per foot (41.6 mm/m), run all the felts parallel to the incline using the same nailing pattern described above.  The adhesive is applied at a nominal rate of 1.0 gallon per square (0.41 liters/m²).

Note: It is recommended that all modified bitumen cap sheets be unrolled, placed upside down and allowed to "relax" for approximately 15 minutes prior to starting the adhesive application. This will permit the sheet to lay flat and should eliminate the formation of creases and fish mouths.

Modified Bitumens-Pour and Spread Method: Starting at the lowest edge of the roof, the mixed adhesive is poured from the pail along the lay of the first sheet, a full width layer of the modified bitumen sheet. The adhesive is spread along the roof in a width slightly wider than the sheet. The sheet is then rolled, scrolled or flopped into the adhesive. The sheet must be firmly and uniformly set, without voids, into the adhesive. The sheet may be positioned and straightened once it is completely laid out. The end 4" (102 mm) of the sheets are coated with adhesive to form an end lap and the spreading of adhesive is continued along the roof. The next sheet is put down as before, covering the 4" (102 mm) area coated with adhesive forming the end lap and seal.  The adhesive is applied at a nominal rate of 1.0 gallon per square (0.41 liters/m²).  Upon complete application of the first course, the second and succeeding courses are applied in the same manner as above. The adhesive is spread onto the lower course in the selvage edge area to seal the side laps. The end laps must be staggered.

Spray Method (Binks Hawk 4L Unit)

Safety Precautions: When spraying in an open area, with adequate ventilation, the spray crew should wear a face shield and respirator equipped with a mist filter and organic vapor cartridge.  When spraying in an enclosed area, adequate ventilation must be provided, i.e., with blowers, fans, etc. In addition, the spray crew and any other personnel working in the area must be provided with fresh air supplied respirators. Ground the spray equipment electrically, to prevent the build-up of static electric charge that could spark and cause a fire.

Equipment: Pour a minimum of three (3) gallons (11.4 liters) of solvent (paint thinner or mineral spirits) into a clean 5 gallon (18.9 liter) pail and set the pump into it. Connect the hoses, take the air cap off the gun, and with the atomizing air pressure turned off, pump solvent through the gun and back into the pail. This will clean the lines and ensure the hose pump and gun are working properly. This will also lubricate the hose, retarding the build up of adhesive on the inside. When equipment set-up is complete, adjust the atomizing air pressure to about 40 psi (277 kPa) and replace the air cap on the gun. Similar techniques should be followed for comparable equipment. Consult spray equipment manufacturer for recommendations on the use of this adhesive with their machine and guns.

Adhesive Spraying: Using the same lay-up pattern prescribed in the Pour and Spread method, employ the following spray techniques.  Place the pump on a freshly prepared pail of adhesive and purge the system of solvent, spraying in a waste pail. When the adhesive begins spraying, move to the application area and coat the substrate in a width and length slightly larger than the first sheet being applied. The adhesive should be sprayed to provide full coverage of about 30 mils (.8 mm) thickness. Once the area has been sprayed, the sheet may be rolled, scrolled or flopped into the bed of adhesive. The end laps must be sprayed to create a seal when the subsequent roll of roofing material is installed. The spray crew should continue to progressively spray more substrate while additional personnel are laying and positioning sheets. Freshly laid cap sheets should be shielded from the spraying operation to prevent overspray. Overspray will not adversely affect the performance of the roof, but may detract from the aesthetics of the system.  Upon completion of laying the first course of sheets, the next course is laid in a similar manner. Adhesive must be sprayed on the selvage edge of the preceding sheet to seal the side lap. For mineral surface products, the working sheet can be used as the shield for the preceding sheet by Iaying it upside down on the preceding sheet aligned with the laying line. Then, when the spraying operation has moved away, the shielding sheet is flopped over into the bed of adhesive.   Depending on the ambient weather conditions on the roof (temperature, sunshine, etc.), the spraying operation must be periodically interrupted to purge the spray equipment. This will prevent a build-up of partially cured material in the hoses, pumps or gun. It is recommended that after spraying five (5) pails of adhesive, the following operation be performed. Remove the air cap, turn off the atomizing air, place the pump on a pail containing solvent (the same one used to originally purge the system) and cycle the solvent through the system until the equipment is cleared. The submerged sections of the pump should be cleaned at this time, also. The frequency of the procedure may be slightly extended on cool, cloudy days, to six (6) pails. Follow manufacturer’s warning for solvents.

Clean Up: Immediately upon completion of work, clean the mixing, pumping, spraying equipment and other tools. The mixing equipment and tools are cleaned by wiping down with solvent-soaked rags. Protective clothing and rubber gloves must be worn for this operation. With "used" solvent, wipe down the outside of the pump thoroughly. Place the pump in the used solvent, and with the air cap removed and the atomizing air pressure off, circulate solvent through the pump, hose and gun for a minimum of five (5) minutes.

Note: Once the MBR Cement has set up, the solvent will no longer remove it.  Then, with clean solvent, wipe down the pump. Push the lower ball valve up and look at the ball to see that it and the cage (the area in which the ball moves) are properly cleaned. Wipe off thoroughly before placing the pump in the clean solvent.  Hold the gun over the waste solvent pail and pump clean solvent until clean solvent comes out of the gun. Then clean the gun, hose and pump thoroughly once more with the clean solvent.  For trouble-free spraying with this material, it is essential to do a thorough cleaning job.  For equipment other than that described in these instructions, similar procedures will be required. Contact the equipment manufacturer for recommendations on what additional or different instructions are required for their particular piece of equipment.

Disposal Information: MBR Bonding Cement, i.e., MBR Bonding Cement Base that has been fully reacted with MBR Cement Activator, can usually be disposed of at a licensed landfill.  MBR Bonding Cement Base is considered a hazardous waste.  Disposal must be in accordance with local, state or federal regulations.  If possible, react any remaining material with MBR Cement Activator; this reactive 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 or federal regulations.  If the material is reacted with one of the MBR Cement Bases, disposal can be as recommended for MBR Bonding 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 Bonding 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.

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-4232.

MBR^® Utility Cement

Description

MBR Utility Cement is a specially formulated, trowel grade, modified asphalt adhesive designed for use with SBS, APP and PAO modified bitumen flashing products. When cured, it forms a durable, elastomeric and watertight film. Unlike most other modified bitumen cold-process adhesives, this product will not damage the modified bitumen blend in the sheet. MBR Utility Cement’s formulation contains very low levels of petroleum spirits which make it compatible with all of the JM modified bitumen and built-up roofing products. It cannot be used with modified bitumen sheets that have a polyolefin burn-off film.

Use

MBR Utility Cement can be used as a substitute for asphalt and MBR^® Flashing Cement in our modified bitumen flashing details.  It can be used to adhere the JM modified bitumen flashing systems, and built-up roofing felts to vertical surfaces; as a general purpose mastic on most built-up roofing and modified bitumen flashing details; or, to strip-in the laps of modified bitumen base flashings.  Modified bitumen sheets are very heavy. To prevent slippage when installed on a vertical surface, the sheets must be secured with nails or mechanical fasteners. If the surface to which the flashing material will be attached cannot accommodate nails or other fasteners, MBR Flashing Cement must be used in lieu of MBR Utility Cement.

Advantages

• Compatible with all modified bitumen and built-up roofing membrane sheets that do not incorporate a polyolefin burn-off film
• Cold process–does not have to be heated
• Cures to form a durable, elastomeric and watertight film
• Ready for use as shipped

Typical Physical Properties

MBR Utility Cement is ready to use as shipped and is not to be thinned. It can be installed in temperatures between 40 and 100°F (4 and 38°C). However, when the temperature is below 50°F (10°C), the adhesive must be stored in a warm area, approximately 70°F (21°C). To minimize installation difficulties associated with cold weather applications, use the less viscous winter grade material.  Also, completely unroll the modified bitumen sheets and allow them to relax at least 15 minutes prior to installation, turning light-colored sheets up-side-down (dark-side up) helps accelerate the process.  For best results, make certain the surface to which the cement will be applied is clean, dry and free of loose material. All masonry surfaces which are to receive MBR Utility Cement must be primed with JM Concrete Primer. The primer must be allowed to dry thoroughly before application of the cement.   Use a notched masonry trowel to spread the MBR Utility Cement evenly, about ¹/8" (3 mm) thick, working down firmly to ensure good adhesion. The modified bitumen flashing product is embedded into the cement and brushed or rubbed in to make contact and to ensure adhesion.

Packaging

MBR Utility Cement is available in 5 gallon (18.9 liter) pails and has an approximate shipping weight of 10 pounds per gallon (1.2 kg/liter). It is available in either a winter or summer grade.  Both formulas contain the same basic ingredients, but the consistency, or viscosity, is adjusted to accommodate the ambient weather conditions in which the adhesive will be applied.

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-4168.

MBR^® Cold Application Adhesive

Description

MBR Cold Application Adhesive is a specially formulated, modified asphalt adhesive designed for use with all JM modified bitumen membranes. When cured, it forms a durable, elastomeric and watertight film. Unlike most other modified bitumen cold-process adhesives, this product will not damage the modified bitumen blend in the SBS, APP and PAO sheets. The MBR Cold Application Adhesive formulation contains very low levels of petroleum spirits which make it compatible with all of our modified bitumen and buiIt-up roofing products. It cannot be used with modified bitumen sheets that have a polyolefin burn-off film.

Use

JM MBR Cold Application Adhesive is for use in adhering roofing plies, modified bitumen membranes and for aggregate surfacings.   It can be used as a direct substitute for asphalt in all JM modified bitumen roof membrane specifications. However, we recommend that only fully coated, non-porous felts, such as JM GlasBase™, GlasBase™ Plus, DynaBase^® , DynaPly^®, TRICOR™ S, BICOR™ S, Classic™ S and JM APP Base Sheet be used as ply and base sheets in cold process systems. Ventsulation^® felt is also acceptable as a base felt. DO NOT USE GlasPly^®IV, GlasPly^® Premier or any APP product with a burn-off film in these systems. For best results, make certain the surface to which the adhesive will be applied is clean, dry and free of loose material. All masonry surfaces must be primed with JM Concrete Primer. The primer must be allowed to dry thoroughly before application of the adhesive.

Advantages

• Compatible with all modified bitumen and built-up roofing membranes
• Cures to form a durable, elastomeric and watertight film
• Cold process–does not have to be heated
• Ready for use as shipped

Typical Physical Properties

MBR Cold Application Adhesive is ready for use as shipped and is not to be thinned. It can be installed in temperatures between 40 and 100°F (4 and 38°C).  However, when the temperature is below 50°F (10°C), the adhesive must be stored in a warm area, approximately 70°F (21°C). The product may become difficult to work with if not kept warm.  MBR Cold Application Adhesive can be installed with a notched squeegee or trowel, as well as spray equipment. Average cover-age per ply is 1.5 to 2.0 gallons per square (0.61 to 0.82 liters/m²).   When used over porous substrates, the coverage rate will increase to approximately 3 to 4 gallons per square (1.22 to 1.63 liters/m²).   Tools and equipment can be cleaned with mineral spirits.

Packaging

Available in 5 gallon (18.9 liter) pails and 55 gallon (208.2 liter) drums (special order), and has an approximate shipping weight of 10 pounds per gallon (1.2 kg/liter). 350 gallon (1,325 liter) tote is available on request.

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-4166.