Aqua Zone is a two-part Epoxy Putty with the ability to cure above or below the waterline. With a 1:1 mix ratio, this versatile repair putty is a must have solution for quick repairs on for damaged boat hulls, barriers, docks, bridges, buoys, sea walls. Once cured on a steel, wood, fiberglass, concrete or aluminum surface, it can be drilled, tapped, sanded and machined.