Flex-O-Glaze Acrylic Safety Glazing is easy-to-install, weatherproof, crystal clear, and shatter-resistant. Ideal for storm door windows or any glass area. Acrylic Safety Glazing is made with virgin acrylic that wont turn yellow or become brittle. This powerful material can withstand high pressures and impacts that would shatter glass. Available in four thicknesses: Single Strength; .100-inch; .125-inch; and .250-inch sizes.