BRICKFORM Poly-Astic is a two-part high solids, durable, and high gloss sealer designed for interior use on concrete or masonry surfaces. Poly-Astic is designed for two coat application resulting in a water clear finish. Poly-Astic provides an extremely durable finish ideal for commercial or residential interior concrete flooring. Poly-Astic does not yellow or deteriorate under UV rays. It is highly resistant to most chemicals and will greatly increase the service life of concrete and concrete overlay flooring.