Cat 5 is a primary air barrier that’s applied with a sprayer or roller to above-grade structural surfaces prepared with Joint & Seam Filler and FastFlash. This product produces a highly durable, seamless, elastomeric weatherproofing membrane on exterior sheathing, CMU backup walls, and precast concrete. Proven to prevent water and air penetration of the building envelope in conditions ranging from everyday to the 155-mph winds of a Category 5 hurricane.
FastFlash is a liquid flashing membrane available in gun or rollergrade. Use it in rough openings, to fill joints and seams, to counter-flash waterproofing and air barrier components in new or existing wall assemblies, and to seal around penetrations. You can also use FastFlash independently or with compatible R-Guard products to prevent the unwanted movement of water and air through building envelopes.
Joint & Seam Filler is designed to fill openings and create transitions. This is required to bridge larger gaps and provide continuous support of fluid-applied flashing membranes, waterproofing or air barrier components.