design guide

Polychloroprene (CR)

Neoprene is a commercial name for polymers comprised of chloroprene. Polychloroprene's overall physical characteristics classify it as a general-purpose elastomer. Excellent aging characteristics in ozone and weather environments, along with abrasion and flex cracking resistance, justify the general-purpose categorization.

Polychloroprene is alkali and acid resistant, flame retardant, and suitable for petroleum based oils. Animal and vegetable fats and greases also provide a highly stable environment for this polymer. Polychloroprene is noted for good compression set resistance, excellent flex fatigue resistance, and resistance to weather and ozone. Its excellent adhesion to metals makes polychloroprene ideal for molding with metal inserts.

Polychloroprene is not effective in aromatic and oxygenated solvent environments.

Compound 482BJ

  • High tensile and tear strength
  • Excellent flex fatigue resistance
  • Excellent serviceability in repeated distortion applications (o-ring drive belts)
  • Good for refrigerants

Compound 337Z, 323AR, 405A, 405DY

  • General purpose neoprene compounds in a range of hardnesses
  • Good weather, ozone, and flex fatigue resistance
  • Moderate resistance to petroleum oils and chemicals

Compound 486CT

  • Excellent aging characteristics
  • Proven in a variety of gasket and washer applications
Compound Hardness
Shore A
Tensile Elongation
Oil Aging
Volume Swell (Change %)
70hr at 100°C/212°F
MPa psi ASTM #1 IRM 903
486CT 70 13.0 1880 200 -2 +41
482BJ 70 18.3 2650 350 +5 +63
337Z 50 10.3 1500 500 -5 +60
323AR 60 11.0 1600 450 +1 +58
405A 80 13.8 2000 220 -2 +48
405DY 90 12.4 1800 100 -1 +35