EPDM (Ethylene Propylene Diene Monomer) rubber, suited for hot water to 120 degrees Celsius, Cold Water, Steam, Freon, Air, Ozone, Oxidizing Chemicals, Up to Medium Concentration Acids, Alkalis, Fireproof hydraulic fluids, Many Ketones and Alcohols
EPDM is unsuitable for use with most oils and fuels, Hydrocarbons, Aromatic and Aliphatic Hydrocarbons, Halogenated Solvents, Concentrated Acids
Viton® (FKM) brand name for Fluoroelastomer manufactured by DuPont, excellent heat resistance to 150 C, suitable for Hot Water, Acid, Alkali, Oils, Hydrocarbons, Salt Solutions, Many Aggressive Chemicals, Diluted Acids, Weak Alkalis, Mineral Oils, Aliphatic and Aromatic Hydrocarbons, Chlorinated Hydrocarbons, Sunlight, Ozone
Viton® (FKM) has a poor resistance to: Ketones, Acetone
PTFE known as Polytetrafluoroethylene, practically resistant to all fluids. PTFE is non-elastic can be used +230C.
Nitrile Rubber (NBR / Buna-N) Nitrile rubber is Butadiene Acrylonitrile, probably the most common seal material considered standard for neutral media up s to approximately 90 degrees Celsius, suited for Water, Air, Different Fuels, Oils, Gases, Aliphatic hydrocarbons, Petroleum, Fuels, Mineral Oil, Vegetable Oil, Hydraulic fluids, Alcohol, Many Acids
NBR has a poor resistance to: Ozone, Acetone, Methyl Ethyl Ketone, Chlorinated Hydrocarbons, Ethers and Esters resistance to sunlight is very poor
Silicone is an inert synthetic compound typically heat-resistant and rubber-like with Low thermal conductivity, Low chemical reactivity, Low toxicity, Thermal stability, Does not support microbiological growth, Resistance to oxygen, ozone, and ultraviolet (UV) light.