Flex Seal Flex Paste Super Thick Rubber Paste, Moldable Leak Protector Sealant, Black, 3-lb

This super thick rubber paste can seal virtually everything. Flex Paste starts as a thick paste and dries to a strong, rubbery coating. Simply spread it to fill gaps and cracks in any material like wood, metal, glass or concrete. The paste clings to surfaces while drying and won't shrink or wash away. Spillage? Seal leaky pipes? No worries! Apply Flex Paste to dry or wet surfaces, even underwater. Once dry, paint over it in any colour. A mouldable sealer that sticks where you put it.