InSeal stocks a range of standard size silicone o rings. Specials can also be supplied to order. These O rings are known for their chemical inertia and as such are useful in extreme environments, and temperatures from -55°C to +300°C. They are an excellent material for static service at extreme (hot or cold) temperatures. Outstanding flex and fatigue life. Very good for ozone and UV radiation service as well as for resistance to fungal and biological attack. Due to their chemical stability they are useful in the pharmaceutical and food processing industries.