Sterling Seal Inc style #7175 silicone 50 – 60 durometer flange gaskets have excellent weathering properties and handle both hot and cold temperature extremes; resists ozone and oxygen attack Silicones, also known as polysiloxanes, are polymers that include any inert, synthetic compound made up of repeating units of siloxane, which is a chain of alternating silicon atoms and oxygen atoms, frequently combined with carbon and/or hydrogen Sterling Seal #7175 silicone gaskets conform easily to uneven flange surfaces, has fair abrasion resistance, good impact strength, excellent resilience and a fair tensile strength Silicone is a very popular flange gasket for hot or cold water Because silicone is odorless and tasteless, it is ideal for certain surgical and food processing applications Silicone rubber sheet has poor resistance to oils, fuels, and hydrocarbons Fair performance when exposed to acids, alkalis and solvents Sterling Seal Inc of NJ style 7175 silicone flange gaskets have proven their long-term reliability over the course of many years