Amazing GOOP 5400040 Coat-It Waterproof Epoxy Sealer & Protector - 2 lb Kit Easy to use  just pour, stir and apply Tough  reinforced with Kevlar fibers for superior strength Practical  enables boats to glide smoothly over debris and rocks Fast drying  sets and dries completely in 10-12 hours , waterproof Seals small leaks and splits in a single coat 2 lb. kit covers approx. 20 square ft. depending on porosity of surface and thickness applied. Superior, waterproof epoxy sealer that will protect boat bottoms or truck beds Cures to a thick, smooth, black graphite coating Reinforced with Kevlar fibers for extra strength Bonds to aluminum, steel, fiberglass and wood Made in the USA