The DuPont Kalrez 0090 perfluoroelastomer O-ring seals, available in the UK from Dichtomatik Ltd, has gained the Total GS EP PVV 142 certification, being the industry standard for sealing products supplied for use with piping, valves and vessels. The Kalrez 0090 range provides outstanding resistance to rapid gas decompression, combined with a broad chemical resistance for use within harsh industrial environments.