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Can I put polyester gelcoat or polyester resin over epoxy?

April 26, 2017Epoxy gelcoat polyester resin

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Can I put polyester gelcoat or polyester resin over epoxy?

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There are conflicting opinions on this subject. We DO NOT recommend applying a polyester gelcoat over epoxy. The polyester based resins/gelcoats do not offer great bonding strength to the epoxy. Instead of gelcoat or polyester we recommend using an epoxy or urethane based primer and paint to finish your epoxy made part. Some industry leaders for these type of finishes include Interlux, Pettit and AwlGrip. Our colored pigments are ideal for colored parts. A ratio of one ounce pigment to one quart resin is recommended. However, for a more brilliant , sharper finish and far superior UV protection, we would recommend finishing your part using a quality paint.