Built on 100% “Terpolymer Technology,” an alternative to silicone & urethane Chemistry (The Best Protector) Commercial / Industrial and High End Residential. Formulated for Vinyl, Fiber-Cement siding, Fiberglass, Cedar, Kynar® Coated Architectural Metals, Brick & Masonry, Sky Lts Sun Rooms, Truck Trailers, Termination Bars & Flashing.