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!Penetrates deep to seal out air, water, and moisture; once dry, it turns into a strong, flexible, watertight, rubberized coatingCan be applied underwater and it even dries underwaterSuper thick rubber paste that clings to the surface and instantly fills large gaps, cracks and holesOnce fully cured, it can be painted any colourMildew and UV resistantHelps prevent rust and corrosion.Excellent for cracks & holes, foundation & concrete, seal out rodents & pests, bath & shower, indoor and outdoor projects, roof, RV, motorhome, auto, marine, lawn & garden projects, DIY, hobbies, and much moreRecommended surfaces: wood, glass, tile, concrete, aluminum, metal, brick, stucco, masonry, copper, fabric, fiberglass, ceramic, porcelain, natural stones, roofing, PVC, EIFS, CSPE, EPDM, Hypalon polyurethanes, and so much more