What Is A Composite Window Sill?
What Is A Composite Window Sill? A composite window sill is a Polystyrene resin composite with marble aggregates the finish is smooth, with round edges and a drip on the underside. Resistance to acids, acetone, detergents, grease, and other chemicals. Fiberglass, on the other hand, is a woven mat with a plastic resin formed in […]