Typical Properties of 40 Durometer Medium Grade Neoprene

Description: 40 durometer medium grade neoprene gasket material designed for use in a wide variety of applications which require a higher percentage of neoprene than our commercial grade. Known by the chemical name chloroprene, 40 durometer medium grade neoprene provides good weathering and ozone resistance for your gasket applications. 40 durometer mid-grade neoprene is made from Neoprene (51%) and a blend of other elastomers and has a service temperature of -30°F to +200°F. 40 durometer medium grade neoprene also offers moderate resistance to oil and gasoline. 40 durometer medium grade neoprene is formulated to meet the ASTM D2000 M1BC 403 specification.

M&P Sealing’s medium grade neoprene is available in a wide range of durometers, ranging from as soft as 30 Durometer to as hard as 80 Durometer with standard durometers in between. 40 durometer medium grade neoprene is available in the color black and can be manufactured in a wide range of standard thicknesses, ranging from as thin a 1/32″ to as thick as 1/4″, with custom thicknesses available upon request. 40 durometer medium grade neoprene has a smooth finish and can be converted into rolls ranging from as narrow as 1/4 wide up to 48″ in width. Additional widths are available upon request. M&P Sealing has the ability to fabricate 40 durometer medium grade neoprene by die-cutting or waterjet cutting to meet your design and production requirements.

Specifications

ASTM D2000 M1BC 403

Physical Property Unit of Measure Typical Values
DUROMETER SHORE A 40 +/- 5
TENSILE STRENGTH psi 450 (min)
ELONGATION % 300 (min)
LOW TEMPERATURE °F
°C
-30°F
-34°C
HIGH TEMPERATURE °F
°C
200°F
93°C
COLOR N/A BLACK
General Characteristics of Neoprene Rubber:
Dielectric Strength Very Good
Dilute Acid Resistance Excellent
Resistance to Oil and Gasoline Good
Resistance to Water Absorption Good
Resistance to Oxidation Very Good
Resistance to Ozone Very Good
Resistance to Sunlight Aging Very Good
Solvent Resistance – Oxygenated (Ketones, etc.) Poor to Fair
Resistance to Chlorinated Hydrocarbons Poor

This information is furnished as a guide for selecting materials. M&P Sealing Inc. disclaims liability for results or use of this information. It is the customer’s responsibility to obtain and test samples when determining the suitability of material for a particular application.