Fabri-Cast 50 Polyurethane Casting Resin (64 Ounces) Ultra-Low Viscosity Casting Resin, Exhibits good impact resistance and strength. Bright White and has an easy 1:1 mix ratio by Weight or Volume Fabri-Cast casting resin turns from liquid to solid in 15 minutes and works excellent in rtv silicone molds Same Day Shipping This is a 2 Quart Kit containing 64 ounces. You will receive 1 Quart of Side "A" and 1 Quart of Side "B"