Quality Umicore Building Products has a firm committment to a strong quality policy. The first step was ISO 9002 certification in 1997, followed by ISO 9001-1994 certification, then ISO 9001:2000 certification in 2003. All VM ZINC® rolled zinc products are certified according to the EN 988 standard. Beyond that, VM ZINC has its own more stringent quality label, PREMIUM ZINC.