Problems with broken glass, vandalism, break-ins? Hammerglass® is a nano technology coated polycarbonate sheet, 300 times stronger than glass and virtually unbreakable. The surface treatment renders Hammerglass® resistant to most chemicals. Detergents can be used to clean up graffiti, marker tags or other soiling, without the Hammerglass panels being damaged. The surface treatment also provides 99.96% UV protection, which means that the material will not cloud, discolour or undergo any other change in optical quality over time. Hammerglass® does not contribute to the spreading of flames in the event of fire.