System Three General Purpose Epoxy is our original product. It actually gave the company its name. From the founding of the company until just a few years ago it has been the workhorse of the product line. The system formulation, containing one resin and three curing agents or hardeners contains a significant amount of renewable materials. Long before "green” was in vogue the System Three General Purpose Epoxy System contained as much as 30% plant derived materials and has never contained any volatile organic compounds (VOC). Features a convenient 2:1 mixing ratio. A solvent-free, unfilled, epoxy system. Use for almost all epoxy applications. Resin formulated for use with any of three hardeners. Select hardener based on minimum temperatures expected during application and desired pot life. Combine different System Three General Purpose Hardeners to provide a continuous range of cure times.