The Resin Pigment is made to be added to Laminating resin to make the resin opaque. The result is a solid opaque surfboard with bright color. Add Pigment before catalyst and stir thoroughly. This was the original style of color put on surfboards back in the sixties. If using pigment with Epoxy, mix thoroughly with hardener side then blend with epoxy side. Yellow (color represented on site is not exact) 2oz.