Profile: Duratec offers polyester sealer, polyester surfacing primer and polyester hi-gloss coating services. Our polyester surfacing primer provides rapid coat buildup and a smooth surface with high gloss. Our Duratec® polyester hi-gloss coating used by boat manufacturers as well as manufacturers of aircraft interiors, architectural woodwork and automotive wood dashboards. Our polyester hi-gloss coating used for gelcoat repair applications and for upgrading tooling gelcoats.