With 90 and 95 durometer hardness, respectively, Viton® Compounds 60895 and 8990 are qualified to ISO 23936-2 standard for resistance to Rapid Gas Decompression experienced in Oil and Gas industry. Both materials received best possible rating of 0000. In addition, Compound 8990 performed to 29,500 psi at .0049 gap and 24,000 psi at .0089 gap, making it an optimal sealing elastomer for this environment.