The key function of a gasket is to serve as the sealing interface between two adjoining surfaces. Gaskets are usually held in place with pressure and friction, but there are applications where the gasket must be held in place with a bond. In these cases, the gasket will have to be affixed or bonded to a substrate so that it may remain in place during its useful life. 

What is a bonded gasket?

A common example of gasket bonding is the household refrigerator. Refrigerator door seals cannot be held in place solely by pressure in friction alone – this may be fine when the fridge door is closed, but when opened the gasket would simply detach from the door. In this case, the gasket must be held in place by being affixed or bonded in some way to the fridge door.

Similarly, in many industrial and automotive applications, it is not possible to hold gaskets and seals in place with pressure and friction alone. The challenge in these applications is to achieve an effective bond between the gasket and the substrate that resists shearing forces, as well as exposure to chemical and environmental factors, that could weaken the bond and detach the gasket from the substrate. This requires choosing a bonding method and adhesive that is appropriate for the application, gasket material and substrate at hand.

Bonded Gaskets: Application Considerations

Gaskets can be bonded to substrates using a variety of methods. These include using adhesive-backed laminating tapes, solvent- and water-based adhesives, perma-bond or instant (rapid cure or cyanoacrylate) adhesives. The choice of which method and adhesive to use will depend largely upon the application.

Solvent- and water-based, as well as perma-bond and instant adhesives, can reliably bond many gasket materials. The resulting bonds will have a good range of resistance to temperatures and solvents which could weaken the bond. To ensure an effective, reliable and durable seal, due attention should be given to both the substrate to which the gasket will be bonded and the application service temperature range and the media with which the gasket bond may come into contact with. Consideration of these criteria will significantly narrow the available options for the specific bonding method and adhesive to be used.

Bonded Gaskets: How CRG Can Help

CRG helps industrial and automotive customers solve their bonded gasket needs in two ways:

If you have a bonded gasket need, CRG will be pleased to review your requirements and propose a solution. For further information, please contact our sales team directly at crg@canadarubbergroup.com.

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