Properties of FPM/FKM (Fluoroelastomer, comparable to Viton®) Fluoroelastomers have become increasingly important in the sealing industry. Due to their wide scope of application regarding chemical resistance, temperature range, low compression set and excellent aging properties, FPM/FKM is the most significant standalone elastomer developed in recent times. Fluoroelastomers are highly fluorinated carbon-based polymers that resist harsh chemical attacks and ozone in various applications. The operating temperature is between -20°C/-4°F and +204°C/+400°F, and temporarily higher.Fluoroelastomer o-rings should be considered for use in aircraft, automobiles and other mechanical equipment where maximum resistance to high temperatures and many fluids is required. FPM/FKM resists mineral oils and lubricants, aliphatic, aromatic and also special chlorinated hydrocarbons, gasoline, diesel fuels, silicone oils and lubricants. It can be used in high vacuum applications.- Excellent temperature resistance- High chemical stability- Very good ozone, weather, aging and oxygen resistance- Excellent resistance to mineral oils and fats- Low gas permeability- Very good resistance to non-polar media- Temperature resistance from -20°C/-4°F to +204°C/+400°FO-ring sizes: Inner diameter x cross section