During composite lamination, a catalyst or hardener is required to activate the resin used in creating your finished part. In this case, a resin additive is a necessary element in the lamination process. Otherwise, fabricators use resin additives for the unique characteristics they bring to the lamination process (like an open-air cure for example) or to a finished part (like added luster).

Examine your application to determine if a resin additive is right for your project.