Expand-O-Flash expansion joint covers are flexible, weatherproof, exterior covers for expansion joint openings and are an effective, flexible closure for a wide variety of standard and special applications. Each Expand-O-Flash cover is a combination of a flexible rubber membrane, supported by a closed cell foam to form flexible bellows, with two metal flanges, adhesively and mechanically combined to the bellows by a patented bifurcation process.

Flexible rubber membranes are available in white or black 60 mil EPDM, and black 60 mil Neoprene. Black EPDM is recommended for budget installations. White (sold at a premium) is used where color is important. However, white does not have the longevity of black. Neoprene is more expensive, and is recommended for use where exposure to process oils or animal fats is an issue.

Metal flanges are available in galvanized steel (26 ga), mill finish aluminum (0.032"), stainless steel (0.018") and copper (16 oz). Galvanized is recommended for budget installations. Aluminum is recommended for areas where longer exposure to severe elements is required. Stainless steel is effective on manufacturing facilities where corrosion could effect longevity of the metal. Copper is used to match other copper metal work.

Selected metals are available on special order including lead coated copper, Terne-coated stainless, Kynar coated 24 gauge galvanized, and .032" aluminum and others.

Closed cell foam thickness varies in thickness from 3 /8" to 3 /4" depending on bellows width.

• Accommodates multidirectional movement
• Non-reinforced bellows for both geometric and elastomeric movement
• Available in 10 foot lengths, 50 and 100 foot rolls (larger rolls also available)
• Compatible with built-up, modified bitumen (SBS, APP and PAO) and single ply (SPM) membranes
• Designed in a variety of styles for application requirements
• Labor saving factory-crafted intersections to fit most needs or custom designed for special needs
• Over 40 years of proven design, fabrication and field performance
• Included in Johns Manville Roofing Systems Guarantees for single source responsibility up to 20 year NDL
• 10 Year Repair/Replacement Warranty. Includes labor and materials for replacement of expansion joint cover, factory produced intersections and field applied splices, when installed consistent with Johns Manville specifications and instructions.