How to Bond EPDM

Bonding EPDM

EPDM (ethylene propylene diene monomer) rubber is a type of synthetic rubber elastomer. It has excellent heat and chemical resistance, and because of that, its use is widespread – particularly in the automotive industry. It is normally black, non-tacky, and often has a slightly dusty feel about it.  Bonding EPDM can be done with both cyanoacrylate and structural acrylic adhesives.


Cyanoacrylate Permabond 105 is a good choice. It is a low viscosity, high purity cyanoacrylate adhesive. It is ideal for hard-to-bond plastics and rubbers such as natural rubber, EPDM, and butyl rubber. Cyanoacrylate adhesives are single component adhesives that polymerize rapidly when pressed into a thin film between parts. The moisture adsorbed on the surface initiates the curing of the adhesive. Strong bonds are developed extremely fast and on a great variety of materials. They have good resistance to non-polar solvents but poor resistance to polar solvents like water.

Structural Acrylic

If cyanoacrylate isn’t appropriate for your application, Permabond structural acrylic adhesives TA4605 and TA4610 also form strong bonds. These are 2-part, 1:1 toughened acrylic
adhesives. They bond low surface energy plastics and EPDM  – with no primer or surface treatment required. They also bond a wide variety of other materials such as metals and composites.

bonding EPDM







Tips for surface preparation:

1. Providing the surface is clean, dry, & free from contamination, EPDM can be bonded “As Received.” There is some indication that plasma pretreatment will improve surface energy for bonding.
2. If a release agent is present on the surface remove it with a solvent wipe before bonding.  Use isopropanol or Permabond Cleaner A; acetone is too aggressive and may attack the rubber.


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