Stir the liquid pigment into the resin or gelcoat before you add the catalyst or hardener, mixing until the color is even with no streaks. Keep pigment to about 10% of the resin by weight at most, since too much pigment can stop the resin from curing fully. Our pigments work in polyester, epoxy, vinyl ester, and gelcoat. Add the MEKP or hardener last, then apply.

Opaque pigments like carbon black and titanium white fully hide what is under them and give a solid color, which is what you want for gelcoat and most colored laminates. Transparent pigments tint the resin while still letting light pass through, so the weave or what is beneath stays visible, which suits clear casting, tinted coatings, and decorative work. Choose opaque for solid color and transparent for a see-through tint.

Liquid pigment is a concentrated colorant that gives solid, even color, so it is the choice for matching gelcoat or coloring a laminate. Mica powder is an ultra-fine pearlescent powder that adds a metallic shimmer and depth instead of flat color, which suits clear casting, resin art, tumblers, and decorative finishes. Both work in epoxy, polyester, vinyl ester, and gelcoat. Use liquid pigment for true color and mica for sparkle and pearl effects.