Metaklett is a steel velcro-like substance created by Josef Mair and teammates at Technical University of Munich. One square meter of it supports up to 35 tons at temperatures up to 800 degrees Celsius. Conventional hook-and-loop fasteners are used for everything from bandages to cable boots in aircraft and securing prosthetic limbs. Mair thinks his spring-steel fastener is tough enough to be used for building facades or car assembly. "A car parked in direct sunlight can reach temperatures of 80