... following: MaterialsApplicable mediumFeatureApplicable temperature°C Natural rubber(X1)Fresh water, Sea water,Salt, Strong base,Weak base,Food High elasticity-20°C ... ~+85°C Hypalon(X2)Fresh water,Sea water,Salt, Strong base,Weak base,Weak acid,Alcohol. Oxidation ... resistant-20°C~+200°CShort time +250°C PTFEFresh water, Sea water, Salt,Weak base,Weak acid,Natural gas, Oil,Food. High ...