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

PropertyUnitTest Method Typical Value
Hardness Shore AptASTM D-224076
Tensile StrengthMPaASTM D-41213.2
Elongation at Break%ASTM D-412185
Specific Gravityg/cm3ASTM D-2972

Compression Set, Aged 22 hours @ 200℃

PropertyUnit Test MethodTypical Value
 6mm Buttons%ASTM D-39521

 Heating Aging, 70hrs@250℃

Property UnitTest MethodTypical Value
 Change in HardnessptASTM D-573+3
 Change in tensile strength%ASTM D-573+6
Change in Elongation%ASTM D-573-22