A special feature of Vamac is its nearly constant damping characteristic over broad ranges of temperature, frequency, and amplitude. It is used in various automotive components such as mounts, gaskets, seals, boots, and ignition-wire jackets. Chemical resistance of perfluoroelastomer parts is similar to that of PTFE, and mechanical properties are similar to those of the fluorocarbon rubbers. However, some fully halogenated fluids and strong oxidizing acids may cause swelling. Resistance to ozone, weather, and flame is exceptional.
Radiation resistance is good and high-vacuum performance excellent.
These are specialty rubbers based on polymers of methyl, ethyl, or other alkyl acrylates. They are highly resistant to oxygen and ozone, and their heat resistance is superior to that of all other commercial rubbers except the silicones and the fluorine-containing rubbers. Water resistance is poor, however, so the acrylates are not recommended for use with steam or water-soluble materials such as methanol or ethylene glycol. However, flex life is excellent as is permeability resistance. Resistance to oil swell and deterioration is also excellent at high temperatures.