Additives & Pigments

WEST SYSTEM Epoxy Additives and Pigments are blended into mixed epoxy to enhance certain physical properties or alter the color or opacity. Blend epoxy additives or pigments into resin and hardener after they are already mixed at the proper ratio (1 pump resin to 1 pump hardener with calibrated Mini Pumps). Additives improve epoxy’s abrasion resistance or moisture resistance. WEST SYSTEM Epoxy additives include Aluminum Powder, Barrier Coat Additive, Graphite Powder.

Additives improve epoxy’s abrasion resistance or moisture resistance. WEST SYSTEM Epoxy additives include Aluminum Powder, Barrier Coat Additive, Graphite Powder. Pigments are resin-based and change the color of epoxy. Pigments are available in white, black or gray.

420 Aluminum Powder - epoxy additives and pigments
420 Aluminum Powder

422 Barrier Coat Additive - epoxy additives and pigments
422 Barrier Coat Additive

423 Graphite Powder - epoxy additives and pigments
423 Graphite Powder

501 White Pigment - epoxy additives and pigments
501 White Pigment

502 Black Pigment - epoxy additives and pigments
502 Black Pigment

503 Gray Pigment - epoxy additives and pigments
503 Gray Pigment

Adding Pigments to Epoxy

Adding WEST SYSTEM pigment to epoxy should, like everything in life, be done in moderation. Without exception, adding pigment to WEST SYSTEM Epoxy will weaken the cured physical properties to some small degree. Because of this, we suggest you use very small amounts of pigment, about 5% by weight. As a result, thin films of colored epoxy are somewhat transparent. It usually requires several coats to make the film opaque.

Pigments are available in three colors, white, black and gray. We suspend the pigments in an epoxy resin base which allows them to blend thoroughly into the epoxy to make very uniform colors. Because the pigment has an epoxy resin base, it is important not to add more than the recommended amount. Adding an excessive amount of pigment to the epoxy could alter the resin/hardener ratio, compromising cured epoxy performance.

Powered epoxy additives also change the color of epoxy. 423 Graphite Powder makes epoxy black; 420 Aluminum Powder makes epoxy gray.

Read more about adding pigments to epoxy, as well as using epoxy additives in fiberglass shower and tub repairs, in  Epoxyworks.