The key properties of Polyacrylic (ACM) are its resistance to hot hydraulic oil and oxidation. It is also resistant to ozone and weathering and in these respects it is much superior to Nitrile Rubber.
Water resistance is poor, as is its resistance to acids and alkalis. Low temperature applications are limited to -10°C. Polyacrylic has very low resilience below 70°C and has found use in vibration damping.
Typical applications include automotive transmissions components requiring resistance to hot oil or fuel.