Sun Coast Glass Protection Inc. says that buyers should look for actual approvals that will meet current codes. Its WindowLock glass securement systems uses a heavy gauge film laminate and a patent-pending locking channel system. The product has FM approval, standard 4350 for small missile impact by Factory Mutual Research Corp.; SBCCI product No. 9969 for large missile impact to meet the Southern Building Codes and has undergone Department of the Army, Waterways experiment testing program.