All Purpose Silicone 1 sealant is 100% waterproof and ideal for a wide range of projects exposed to harsh weather from the attic to the basement. Permanently flexible, it can stretch and move with expansion and contraction and will never break down due to ultraviolet rays or freezing temperatures. This high-quality sealant is resistant to unsightly stain causing mildew growth. It’s easy to apply and offers excellent adhesion to many common building materials including most wood, metal, vinyl siding, drywall/plaster, glass, and plastic. Backed by a lifetime guarantee.
