Volcano Sleeve is made from continuous filament basalt fiber and is engineered for protection from temperatures up to 1,200°F. The Basalt fiber is a 100% inorganic, mineral, continuous filament with an excellent high temperature and shock resistance. Basalt fiber is similar to carbon fiber and fiberglass, but basalt has better mechanical properties than fiberglass and is lower in cost than carbon fiber. The volcanic rock sleeve is easy to install and will provide years of protection and good looks. Volcano Sleeve can be used both for electrotechnical applications & fire protection in the production of cars, airplanes, ships and household appliances.