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• <br /> Natural SBR EPDM Butyl Neoprene Nitrile Hypalon Cast Poly- Hydrin/ Silicone Viton <br /> Designation Rubber (Buna N) urethane Herclor <br /> Durometer Range A 20-100 30-100 40-90 40-90 20-95 20-100 50-90 10-100 60-80 20-80 60-90 <br /> Normal Tensile Range,PSI 1000-4000 1000-3000 1000-3000 1000.2000 1000-2500 1000-2500 1000-2500 2500-8000 1000-2500 700-1200 1000-2000 <br /> Normal Elongation Range,% 400-900 200.500 300-900 300-900 200-800 100-500 200-500 100-500 100-400 100-300 100-300 <br /> Compression Set Resistance GOOD GOOD GOOD FAIR GOOD GOOD FAIR EXCELLENI GOOD GOOD GOOD <br /> Typical Brittle point°F -70 -50 -80 -50 -40 -40 -40 -60 -50 -100 .40 <br /> Stiffening Temp.°F -20--50 0 TO-50 -20 TO-50 -10 TO-40 +10 TO-20 +30 TO-20 -20 TO-40 -10 TO-30 -15 TO-35 -60 TO-160 +10 TO-5 <br /> Upper Temp.Limit°F 200 200 300 250 250 300 300 220 325 600 600 <br /> Weather Resistance FAIR FAIR EXCELLENJ EXCELLEN1 EXCELLEM FAIR EXCELLENI EXCELLENI EXCELLENI EXCELLENT EXCELLENT <br /> Ozone Resistance FAIR FAIR EXCELLEN1 EXCELLENI EXCELLEN7 FAIR EXCELLENT EXCELLENT EXCELLENI EXCELLE EXCELLENT <br /> Chemical Resistance: <br /> Water GOOD GOOD EXCELLENI EXCELLEN1 GOOD GOOD GOOD EXCELLEN1 FAIR EXCELLEN7 GOOD <br /> Acids GOOD GOOD EXCELLENI EXCELLENI GOOD GOOD GOOD POOR FAIR GOOD GOOD <br /> Alkali GOOD GOOD EXCELLENI EXCELLEN1 GOOD GOOD GOOD POOR POOR GOOD GOOD <br /> Aliphatic Solvents POOR POOR POOR POOR GOOD EXCELLENT GOOD GOOD EXCELLENI POOR EXCELLENT <br /> Aromatic Solvents POOR POOR POOR POOR POOR FAIR POOR POOR FAIR POOR EXCELLENT <br /> Oxygenated Solvents FAIR FAIR GOOD GOOD FAIR POOR FAIR POOR POOR FAIR POOR-FAIR <br /> Chlorinated Solvents POOR POOR POOR POOR POOR POOR POOR POOR FAIR POOR GOOD <br /> Petroleum Oil POOR POOR POOR POOR GOOD EXCELLENT GOOD GOOD I EXCELLENI POOR EXCELLENT <br /> Phosphate Esters POOR POOR GOOD GOOD POOR POOR POOR POOR POOR GOOD POOR <br /> Resilience EXCELLENT GOOD GOOD POOR GOOD FAIR FAIR EXCELLENI GOOD FAIR FAIR <br /> Gas Permeability MODERATE MODERATE LOW VERY LOW LOW LOW LOW LOW VERY LOW MODERATE VERY LOW <br /> Abrasion Resistance GOOD GOOD GOOD FAIR GOOD GOOD GOOD EXCELLENI GOOD FAIR FAIR <br /> Flex Crack Resistance EXCELLENT GOOD GOOD EXCELLEN7 EXCELLENT GOOD GOOD EXCELLEN7 EXCELLE FAIR GOOD <br /> t <br /> Ro-Lab American Rubber Co.,Inc. <br /> 8830 West Linne Road <br /> P.O.Box 450 <br /> Tracy,CA. 95376 <br /> (209)836-0965 �I POLYURETHANE <br /> MANUFACTURERS <br /> Fax: (209) 836-0465 uul�����������um��huulll��lluuutlllllllllllllllll ASSOCIATION <br />