This is the workhorse of the System Three Resins' stable, fitting well into over 90 percent of all epoxy applications. It is a 100 percent solids, unfilled, medium-modules epoxy system. It works great for new wood construction and repair, for gel coat blister repair, and for general fiberglass boat repair. Use at a simple 2:1 volume ratio with any of the three hardeners. System Three epoxy has excellent pot life and cure-time control. Use at temperatures as low as 35 degrees with no limitations on humidity. System Three epoxy cures to a very tough, resilient, clear film. The medium-low viscosity of System Three epoxy allows use "as is" for coating and fiberglass work. Combine with different fillers to make excellent adhesive, filleting and fairing compounds. When selecting a hardener, consider the minimum temperature expected during application, and the required pot life. Combine different System Three hardeners to provide a continuous range of cure times within the extremes of the Fast and the Slow.