Can polyester or gel coats be applied over epoxy?

The general rule is that epoxies will bond over cured polyester but polyesters do not bond over epoxies. To get around this problem, we developed a resin system that can be used as a "tie-coat" barrier and is unique in allowing polyester resins and gel coats to be bonded directly over it. This epoxy is called the SB-112 and is available on our website here.

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