Materials

FFKM Material Grades

Seven proprietary OM-series compounds from -42 °C to +320 °C, 70–90 Shore A. Every figure published with its ASTM test standard and condition.

OM-series FFKM grade property comparison
Grade	Hardness	Service temp.	Comp. set	Test condition	Process	Seal type
OMS70S	73 Shore A	-10 to +275 °C	23 %	70 h @ 250 °C, 25 % deflection, Type B	Dry + Wet	Static + Dynamic
OMS7102	75 Shore A	-10 to +300 °C	20 %	70 h @ 250 °C, 25 % deflection, Type B	Dry + Wet	Static
OME7505	75 Shore A	-10 to +320 °C	23 %	70 h @ 300 °C, 25 % deflection, Type B	Dry + Wet	Static + Dynamic
OMS7503	70 Shore A	-10 to +275 °C	17 %	70 h @ 200 °C, 25 % deflection, Type B	Dry	Static + Dynamic
OM7502	75 Shore A	-10 to +230 °C	19.6 %	70 h @ 200 °C, 25 % deflection, Type B	Dry	Static + Dynamic
OM7542	75 Shore A	-42 to +230 °C	19.6 %	70 h @ 200 °C, 25 % deflection, Type B	Wet	Static + Dynamic
OM9090	90 Shore A	-10 to +290 °C	16 %	70 h @ 200 °C, 25 % deflection, Type B	Dry + Wet	Static + Dynamic

Switching from another brand?

Parameter-level comparison against Kalrez®, Chemraz®, Isolast®, Perlast® and other perfluoroelastomer grades, with the basis for each pairing.

Property	Standard	Typical result
Hardness	ASTM D2240	Shore A, per grade
Tensile strength	ASTM D412	≥ 15 MPa
Elongation at break	ASTM D412	≥ 100 %
Compression set	ASTM D395 Method B	16–23 % at stated conditions
Outgassing (TML / CVCM)	ASTM E595	Reported per grade / project
Chemical compatibility	Media exposure testing	Screening chart published; full chart on request