Polyacrylate is a copolymer which offers good resistance to petroleum fuels and oils. The auto industry uses polyacrylate O-rings as seals in automatic transmissions and power steering designs. Resistant to flex cracking, polyacrylate also resists damage from oxygen, sunlight, and ozone (due to main chain saturation).
Use of a butyl acrylate instead of an ethyl acrylate rubber can greatly improve low temperature flexibility. Though it is marginally more resistant to hot air than nitrile, polyacrylate falls short in strength and compression set resistance, as well as in resistance to water and low temperatures.