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| Moisture and steam resistance |
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| Silicone rubber can be immersed in water (cold water, warm water, boiling water) for long periods with water absorption of about 1%,and with virtually no effect on mechanical strength or electrical properties. Typically, under ordinary pressure, contact with steam causes almost no deterioration of silicone rubbers. With pressurized steam, however, the effects increase as steam pressure increases. High pressure steam at temperatures over 150∑C causes breakdown of the siloxane polymer and a decline in the properties of the rubber. Thiseffect can be ameliorated by adjusting the silicone rubber formula, selecting a proper curing agent, and/or post-curing. There are numerous products available with improved resistance to steam and hot water. |
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