Epoxy resin comes in two parts. The resin side is the ‘A’ side and the hardener is the ‘B’ side. Our epoxy comes in 2:1 and 4:1 ratios. There are three different hardeners to choose from. They are fast, medium and slow. The choice of which hardener to go with depends on the temperature, the desired working time and drying time. Epoxies dry with a full surface cure.