Cool-Tek was founded as the result of a strong partnership between the German company ems isoliertüren — established in 1970 with over 55 years of expertise in precision-engineered insulated doors — and a third-generation U.S. cold storage contractor — Superior Industries. At Cool-Tek we combine decades of German engineering excellence with deep insight into the American market. Our tailor-made insulated door systems are built to the highest standards of quality, durability, and performance. With engineering rooted in Germany and full-service support based in the U.S., we bring you the best of both worlds — precision and proximity.