They are also said to be many times stronger than acrylic sheets, offering a margin of safety that no other clear glazing material can equal. Makrolon SL offers the impact protection of polycarbonate and the UV resistance of acrylic. Makrolon AR combines high-impact strength with abrasion and chemical resistance. Makrolon Hygard, a security glazing laminate, resists physical and ballistic attack.

Sheffield Plastics Inc., A Bayer MaterialScience Co., 119 Salisbury Rd., Sheffield, MA 01257, (800) 254-1707,