Sealing profiles

Properties of Rubber

A: Due to the great number of existing chemicals, possible temperatures and times of exposure, the stated qualities can vary from case to case.

B: The qualities of the rubber become worse at relatively high or low temperatures.

C: The stated ranges are accurate under normal circumstances. Extreme strains or environments will make the actual ranges smaller.

++ = Perfect or very good. + = Good. 0 = Average qualities. - = Poor qualities.

Types of Rubber
Material Natural rubber Styrene butadiene rubber (Buna™) Nitrile rubber (Perbunan™) Chloroprene rubber (Neoprene™) Ethylene propylene-diene rubber (EPDM™) Fluorine rubber (Viton™) Methyl silicone rubber (Silopren™) Polyvinyl chloride (Vestalit™, Vestolit™)
Abbreviations according to ASTM D 1418 NR SBR NBR CR EPDM FKM MQ/MVQ PVC
Hardening (Shore A) (±5) 40-90 45-90 45-90 40-90 40-90 65-90 30-80 55-95
Resistance to tearing (N/mm2) (B) 4-15 4-15 4-14 4-15 6-13 0 0 0
Spring-back elasticity at 20°C ++ + 0 + + 0 0
Abrasion resistance (B) ++ ++ + + + 0 0 0
Chemical resistance (A) + + 0 + ++ ++ + ++
Oil resistance (A) - - ++ + - ++ + +
Fuel resistance (A) none - + - - ++ - -
Solvent resistance (A) - - + + 0 0 + 0
Temperature resistance in °C (C) -40 to +80 -30 to +80 -30 to +100 -25 to +100 -40 to +120 -20 to +200 -50 to +180 -25 to +60
Ozone resistance 0 0 0 ++ ++ ++ ++ 0
Weather exposure resistance + + + ++ ++ ++ ++ +
Gas penetration resistance 0 0 + + 0 0 +
Resistance to permanent deformation (B) ++ + + + + 0 0 0
Binding to metal ++ ++ 0 + 0 0 0
Dielectric qualities ++ + - 0 ++ + + 0

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