EZ Fair epoxy compound is a lightweight, two-part epoxy putty designed for filling and smoothing surface imperfections above and below the waterline. For fairing metal keels or any underwater surface. Use it for leveling uneven surfaces, filling gouges, scratches, or other damage on fiberglass, wood, or metal surfaces. Chemical and water-resistant compound is ideal for repairing blistered gel coat. Waterproof when cured. Non-sagging and non-shrinking formula sands to a smooth finish. Can be easily repainted. Cures quickly.