Polar-Ply RB-GB is commonly used as a flame and smoke barrier for single coat stucco systems. This product is a barrier between the systems polystyrene foam assembly and attic or other plenum areas such as fireplace chases where drywall or other noncombustible assemblies do not occur.

Polar-Ply RB-GB is made of high quality aluminum foil laminated to both sides of 65 lb. machine glaze kraft paper with a proprietary flame retardant/water resistant adhesive.