One-component primer for fiberglass, based on modified alkyd resins. Suitable Primer for fiberglass or gelcoat above the waterline offering maximum adhesion for one-component topcoats. Excellent direct adhesion to fiberglass or tie-coat adhesion lo one-component yacht paints. Fills very small surface irregulanties to a smooth film. High-build and excellent covering capability create an even primer coat. This is especially important when topcoating with a different color.