System Three Mirrorcast Clear Epoxy Casting Resin Kit, 1.5 Pint is a clear epoxy resin specially formulated to fill knots, cracks, and voids in wood substrates with minimal shrinkage before finishing. This versatile resin cures to a smooth, hard finish that can be sanded, shaped, and drilled, making it i for creating decorative wood art or repairing medium to large knots, checks, and inclusions in wood slabs. MirrorCast can also be tinted using System Three epoxy pigment dispersions to achieve custom colors. To determine the amount needed, multiply the length, average width, and average depth of the areas to be filled, then select the appropriate kit size. It is to add 10% extra to ensure sufficient material. The 1.5 Pint kit contains 45 cubic inches of resin. MirrorCast requires a minimum curing temperature of 70°F and a working time of one hour at this temperature, making it practical for various woodworking projects.