A heavy duty epoxy formulated for high build applications, such as repairing pipes & tanks or fixing loose fittings. Hand-moldable Plumber Seal cures to a steel-like substance and bonds steel, aluminum, copper, brass, plaster, concrete, wood and ceramics. Resists oils, grease, detergents, many alkalies and some weak acids. Adheres to damp surfaces - cures under water - will not shrink or sag.