Polyester pigment pastes are used to color any composite resin and gelcoat. They contain specially designed polyester resin and pigments for maximum compatibility. These pastes are produced by grinding powdered pigments with polyester resin with special formulations. It doesn’t contain reactive monomers in it, so their shelf life is quite long compared to unsaturated polyester resins. We recommend using pigment paste in ratio of 1-20%. Depending on the color tone and saturation, you can use pigment pastes in resin or gelcoats in any amount you want. These pastes are also compatible with some other resin systems, such as polyurethane and alkyds. Pigment paste may cause some changes in the physical properties of the resin. A high amount of cake usually means lower physical strength. Also, consider the accelerator and catalyst level to prevent unwanted color differences. We offer many different pigment paste options for applications such as SMC, BMC, pultrusion.