TotalBoat 5:1 Epoxy Fast Hardener Low viscosity epoxy curing agent for use with TotalBoat 5:1 epoxy resin Compatible with all traditional 5 part resin to 1 part hardener marine epoxies Combine with resin to create a rigid, high strength moisture resistant solid with excellent bonding and coating properties Available in three sizes for quart, gallon, and 5 gallon resin. Dispense with TotalBoat pumps to ensure correct ratios