This candle wax additive will improve burning time and give an opaque or white appearance to the candle. Opacifier, hardener and color vehicle. Crystal Brite Stearic Acid is a 100% pure vegetable based stearic acid. It is Food Grade, NF Grade, and Kosher. Recommended use is 2 to 9 tablespoons per pound of candle wax and will not inhibit the glow effect of the wax.