The high performance compound used and developed exclusively by Koemmerling is KÖMALIT Z. The longevity and superior quality of this material has been conclusively proved for almost 50 years. This, Koemmerling’s own material compound, performs to worldwide standards for strength, durability, heat stability, colour retention and termite resistance. KÖMALIT Z, in fact, significantly exceeds the stringent requirements of the highest classification of DIN standard 77498 for impact resistance. This fact provides an additional margin of safety to the quality of the product and enables the profiles to be fitted even in high-rise buildings.