ASTM D 1418 Designation: AEM

ASTM D 2000, SAE J200 Type / Class: EE, EF, EG

STANDARD COLOR: Black

TRADE NAME:
• Vamac® (DuPont Dow Elastomers)

RELATIVE COST: Medium

GENERAL TEMPERATURE RANGE: -40° to +300° F

Better known as Vamac®, ethylene acrylic is a copolymer of ethylene and methyl acrylate. Vamac also has a third, acid-containing monomer to cure the polymer chain’s active groups (see Figure 36). Vamac offers exceptional resistance to ozone, sunlight, and heat, as well as low gas permeability and moderate oil swell resistance. Flex life is good, as are tear, abrasion, and compression set properties.

AEM PERFORMS WELL IN:
• Alkalis
• Dilute acids
• Glycols
• Water
• as power steering & automatic transmission seals

AEM DOES NOT PERFORM WELL IN:
• Aromatic hydrocarbons (benzene, toluene, xylene)
• Brake fluids
• Gasoline
• Ketones
• Phosphate esters
• Strong acids

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