Advantages of FKM rubber compounds

FKM is the short form for the fluoroelastomer category according to the American standard ASTM and has a lot of advantages. It has an excellent temperature resistance, high chemical stability, excellent resistance in mineral oils and fats, low gas permeability, a very good resistance in non-polar media and a good weather, aging and oxygen stability. Besides it has a very wide temperature range (–20 °C to +225 °C).


Material Type : Black color fluoroelastomer compound, hardness Shore A 65-90.

Features : Excellent mold flow, excellent mold release & good compression set. Suitable for compression, transfer molding.

Fluoro Content:71%

Applications : Not recommend for Steam and hot amine working condition.typical application O-ring, Gaskets and other sealing parts.

Working Temperature Range : Maximum +285℃ Minimum- 20℃

Lab Testing Curing Condition : Press Cure: 15min@180℃.

Post Cure :(8+ 16)hrs@250℃

Original Properties

Property Unit Test Method  Typical Value
Hardness Shore A pt ASTM D-2240 76
Tensile Strength MPa ASTM D-412 13.2
Elongation at Break % ASTM D-412 185
Specific Gravity g/cm3 ASTM D-297 2

Compression Set, Aged 22 hours @ 200℃

Property Unit  Test Method Typical Value
 6mm Buttons % ASTM D-395 21

 Heating Aging, 70hrs@250℃

Property  Unit Test Method Typical Value
 Change in Hardness pt ASTM D-573 +3
 Change in tensile strength % ASTM D-573 +6
Change in Elongation % ASTM D-573 -22