Trade Name
  • Vamac® — Dupont
ASTM D1418 Designation
AEM
ASTM D2000/SAE J200 Type, Class
EE, EF, EG, EA
Apple Compound Designation
VA
Standard Color
Black
Description
A copolymer of ethylene and methyl acrylate, with small amount of third monomer added to provide a cure to active groups in the polymer chain, Vamac® exhibits properties similar to those of polyacrylate, but with an extended low temperature limit and better mechanicals.
Key Uses
Seals for automotive applications, such as automatic transmissions and power steering systems.
Temperature Rage
Standard Compound: -13°F to +338°F (Dry Heat Only)
Hardness (Shore A)
50 to 90
Features
  • Ideal for automotive sealing uses, Vamac® features excellent heat resistance, outstanding resistance to ozone and sunlight aging moderate resistance to swelling in oils, and very low permeability to gases.
  • Vamac®'s mechanical properties, adhesion to metals, tear resistance, flex life, abrasion resistance and compression set resistance are all rated as “good.”
  • Resistance to water, engine coolant mixtures (glycols), dilute acids and alkalis is also good.
Limitations
Vamac® is not recommended for exposure to concentrated acids, aromatic hydrocarbons, gasoline, ketones, brake fluids and phosphate esters.

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