Use for added security in place of glass in storm doors or windows, garage door windows, sunroom/patio windows, vehicles (RVs and motorcycles), machine guards, outdoor sign covers or light covers. 250X stronger than glass, virtually unbreakable and resists yellowing for long life. Blocks harmful UV rays to save energy. Cut with hand, jig, saber or circular saw using fine tooth, hollow ground blades. Clean easily with soft cloth or sponge and mild soap or detergent in lukewarm water. Meets BOCA (21-41), ICBO (ER-3286), SBBCI (9592A) and ANSI Z97.1-84 teat report #417613 building standards.