+34 985 30 11 73 info@juntasindustriales.com

The basis of the product: chloroprene

The chloroprene (CR) is the basis of the commercial product Neoprene® developed by Dupont. Chloroprene rubber is a synthetic rubber and has good chemical properties that make it very popular for use in industry and in our case for the manufacture of gaskets.

Chloroprene Rubber, Neoprene® Rubber, CR Rubber?

All three are correct ways of naming chloroprene rubber, with Neoprene® being the original Dupont trade name and CR being the abbreviation of its name in English (Chloroprene).

It often leads to confusion to think that chloroprene rubber, being commonly called Neoprene®, has a spongy feel and composition, similar to that of diving suits. Yes, these suits are made of chloroplene rubber, but with a specific spongy structure, therefore the normal structure of chloroprene rubber is solid.

At sight it blends perfectly with any other type of black rubber, be it SBR, NBR, Butyl, etc.

cr neoprene chloroprene rubber

Characteristics of Chloroprene rubber


Specific gravitygr/cm31.45
Indentation hardnessShore AASTM D224070
Breaking loadMPaASTM D4126.0
Elongation at break%ASTM D412300


Die C

TemperaturesºC-20 / 100

Thermal aging

(hot air 70ºC 70h)

Shore A







Permanent deformation

(70ºC 22h)



Method B


Resistance to solvents

(70ºC 70h)

ASTM 5 oil

IRM 903 oil




Chemical Resistance:
Diluted Acids and BasesModerate
Concentrated Acids and BasesNOT Recommended
HydrocarbonsNOT Recommended
Organic SolventsNOT Recommended

    Applications of Chloroprene rubber (Neoprene®)

    • Excellent resistance to oils, ozone and weathering.
    • Suitable for moderate acids, alkalis, salt solutions, petroleum, solvents, oils and fuels.
    • Great resistance to aging and high temperatures.
    • Molding: Supports for bridges, expansion joints, pipes, mechanical seals, belts, solid propellant, balls, etc.
    • Chloroprene rubber NO is compatible with:
      • Aromatic (benzene) and chlorinated (trichloroethylene) hydrocarbons.
      • Polar solvents (ketones, esters, ethers).
    • Manufacture of sealing joints in work environments previously described.

    Formats of Chloroprene rubber (Neoprene®)

    NameThickness (mm)Measurements (mm)
    Chloroprene (CR)0.8 / 1 / 1.5 / 2 / 3 / 4 / 5 / 6 / 8 / 10Roll 10000 x 1400
    • We have numerically controlled machinery for high precision cutting.
    • Other formats and thicknesses are possible, do not hesitate to consult us.


    Any questions?