Cat 5 is a single-component, silyl-terminated polymer (STP) that is roller-applied to produce a highly durable, seamless, elastomeric weatherproofing membrane on exterior sheathing, CMU back-up walls, and pre-cast concrete. Cat 5 is proven to prevent water and air penetration of the building envelope in conditions ranging from everyday weather to the drenching rains and 155-mph winds of a Category 5 hurricane.
Use Cat 5 as the primary air barrier over above-grade structural surfaces prepared with Joint & Seam Filler and FastFlash. Solvent-free. Isocyanate-free. Phthalate-free. Complies with all VOC regulations.