Flex Paste is a super thick, rubberized paste that you can spread, shape, form, and seal virtually everything. It starts out as a thick paste and dries to a strong, flexible, rubber coating that can be applied to all types of surfaces to seal out air, water, and moisture. It clings to the surface and instantly fills large gaps, cracks, and holes. It won't shrink or wash away and can be painted any color. Can be applied on dry or wet surfaces, even underwater! Flex Paste is perfect for• Fixing cracks and holes• Foundation and concrete repair• Sealing out rodents and pests• Bath and shower repair• Indoor and outdoor projects• Roof repair• RV and motorhome repair• Auto repair• Boat repair• Lawn and garden projects• And so much more! Flex Paste works on wood, glass, tile, concrete, aluminum, metal, brick, stucco, masonry, copper, fabric, fiberglass, ceramic, porcelain, natural stones, roofing, PVC, EIFS, EPDM, CSPE, Hypalon polyurethanes, and much more. Apply to all types of surfaces to seal out air, water, & moisture Instantly fills large gaps, cracks, & holes Won't shrink or wash away & can be painted any color | Flex Seal Flex Paste, White, 3-lb. Tub