Xcel Surfaces Top Coat is a low sheen, 100% acrylic formulation that is high in solids and designed for use as an opaque colorant on Xcel Surfaces overlayments. Top Coat IR acrylic formulation incorporating solar reflective and thermal emitting properties significantly reducing coating surface temperatures Top Coats can also be used on masonry finishes such as C.M.U. walls or stucco finishes as well as wood, plaster and metal.