Legendary, super-strong Flex Seal Flex Glue is a powerful, waterproof adhesive with instant-grab. Specifically formulated to work on all types of surfaces, it can be applied on dry or wet surfaces - even underwater. Solvent-free, paintable, sandable formula won't run or drip, so it can be applied overhead. It's UV-resistant, chemical-resistant and mildew-resistant, making it ideal for both indoor and outdoor use. Use to seal out water and air for roof and siding repairs, bath and shower fixes, shoe repairs, furniture repairs, boat and RV repairs and more. Glue easily adheres to porcelain, metal, steel, stainless steel, fiberglass, marble, stone, laminate, glass, ceramic, brick and more.