Epoxy Curing Agent manufacturer / supplier in China, offering Mercaptan Based Hardener Approx. Gel Time 10 Minutes Epoxy Curing Agent, 2, 3-Bis ((2-mercaptoethyl)thio) -1-Propanethiol Polymercaptan Polythiol, Mercaptan Based Hardener Approx. Gel Time 40 Seconds Epoxy Curing Agent and so on.