Polyacrylate Rubber O-Rings & Molded Seals | Seal & Design Inc.

Polyacrylate (ACM) Rubber

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Polyacrylate MaterialACM or simply acrylate rubber consists of a polymerized ester and a curing monomer. Ethyl acrylate rubber has a good resistance to heat and mineral oil; on the other hand butyl acrylate has a better cold flexibility. Polyacrylate has a good resistance to mineral oil, oxygen and ozone even at high temperatures. The water compatibility and cold flexibility of ACM are significantly worse than with NBR.

Both o-rings and gaskets can be made from Polyacrylate materials.

Names: Polyacrylate, ACM, Acrylate

Compound Info
ASTM D1418 Designation ACM
ASTM D2000/SAE J200 Type, Class DH, DF
Hardness (Shore A) 40-90
Color black, green
Thermal Properties
Standard Min Temp. -25°F (-31°C)
Max Temp. 300°F (148°C)


Chemical Resistance
Chemical Resistance
  • Mineral oil (engine, gear box, ATF oil)
  • Ozone, aging, and weather resistance
Not compatible
NOT compatible
  • Glycol based brake fluid
  • Aromatics and chlorinated hydrocarbons
  • Hot water, steam
  • Acids, alkalis, amines

Disclaimer: These are general guidelines only. All materials should be tested in your application.