WINKEL PRO 5 Minute Clear Epoxy is an unfilled, 100% solids, fast setting epoxy that can be handled in 5minutes and cures to a full bond strength in one hour. It does not contain fillers. It has superior bonding characteristics, high chemical resistance and may be immersed in water for extended periods. It is an excellent choice for all purpose repair because it bonds to a wide variety of materials, including wood, ceramics, metals, fiberglass, glass, china, and concrete.