Mostly silicone rubber seals, there are other materials such as polyurethane.
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Rubber material has excellent resistance to heat, cold, ozone and atmospheric aging. There are very good insulating properties. But the tensile strength is worse than general rubber and does not have oil resistance. Applicable to household appliances such as electric water heaters, electric irons, microwave ovens and so on. Also applies to a variety of supplies in contact with the human body, such as kettles, drinking fountains and so on.
Not recommended for use in most concentrated solvents, oils, concentrated acids and sodium hydroxide. The general use temperature range is -55~250 ℃. High temperature resistance is better than silicone rubber, excellent weather resistance, ozone resistance and chemical resistance, cold resistance is poor.
Resistance to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons and animal and vegetable oils. Suitable for sealing needs of diesel engines, fuel systems and chemical plants. Not recommended for use in ketones, low molecular weight esters and nitrate-containing mixtures.
It combines the advantages of fluoroelastomer and silicone rubber, with excellent resistance to oils, solvents, fuel oils, and high and low temperatures. It can resist the erosion of oxygen-containing compounds, aromatic hydrocarbon solvents and chlorine-containing solvents. Generally used in aviation, aerospace and military applications. Exposure to ketones and brake fluids is not recommended.
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