If you need to seal components against solvents and other chemicals at temperatures from as low as -60oC to as high as +205oC, why not try Dichtomatik's range of Teflon encapsulated FEP O-rings. Described in a new leaflet, which is available free from the company, these seals also offer a low coefficient of friction, good shore hardness, low vapour permeability and minimal water absorption in both dynamic and static applications. The encapsulation encloses a core of either Viton or silicone elastomer - a combination that offers resistance to embrittlement and compression set, while retaining flexibility.