Premium quality, nitrile based cork-elastomer jointing that meets the requirements of specification BS F 66. Previously designated Nebar® A/CT. Prime features High compressibility at low bolt loadings. Resists a wide range of fluid media. +110°C maximum operating temperature in liquids. Retains flexibility down to -20°C. Easy to cut, handle and install. Specification Conforms to BS F 66. Fluid compatibilities Suitable for use with air, water, alcohols, fuel and diesel oils, mineral and synthetic lubricating oils, mineral hydraulic fluids, and water/glycol, plus ASTM oil 1, IRM903 oil, ASTM Fuel A, BS148 Transformer Oil. Physical properties (Tested to ASTM F104 procedures) Hardness, IRHD: 60 to 75 (ASTM D1415) Tensile strength, MPa minimum: 1.72 (ASTM DF152B) Compressibility @ 2.8N/mm², % : 20 to 30 (ASTM F36B) Recovery, minimum %: 75 (ASTM F36B) Fluid resistance, % volume change in: ASTM Oil No 1, 72h @ 100°C: -5 to +15 (ASTM F146) IRM903, 72h @ 100°C: +5 to +20 (ASTM F146) ASTM Fuel A, 22h @ ambient: +5 to +15 (ASTM F146) BS148 Transformer Oil, 14 days @ 90°C: +1.0 (ASTM F146)