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Coruba’s Tips for Installing Rubber Grommets

Grommets are flexible and extremely useful moulded products which are commonly used in items such as cable wires, tubes and screws. Although available in different materials such as plastic and metal, rubber grommets are preferred because they offer more benefits than the alternatives and they are much easier to install. Grommets can be used for waterproofing, covering holes with sharp edges, sealing gaps and vibration damping.

Here are some tips for a more convenient grommet installation process:


Rubber Grommet Installation Tips 

Proper Measurement

Rubber grommets come in different sizes, so make sure you take the necessary measurements. It is important that you get the right size to ensure successful installation.

If you are filling a hole, measure it before installing the rubber grommet. If there is no opening, drill or punch according to the recommended size of the grommet; the hole should perfectly accommodate the grommet.

Cleanliness for Ease and Safety

Make sure that the object is clean before you fit the grommet, as dirt might create bigger problems in the long run. If you punched or drilled an opening in the material, smooth the edges before installing the grommet to make the fitting a lot easier.

You can use a damp cloth to wipe away any grime or grease.

Installation Process

Since rubber grommets are a more flexible option, they are quite easy to install.

You can manipulate the edges of the hole to insert the grommet, bending the grommet where necessary to fit it into the opening.

You can use a plastic putty knife to push the grommet completely into the hole - silicone sealant might help with tight fits (apply around the grommet before pressing it into place). The sealant will also help to secure the grommet after it dries.

Additional Tips
  • If you don’t have any silicone sealant, you can use plain grease or petroleum jelly - use liquid soap to remove the residue after installation.
  • To make the rubber grommet more pliable, let it sit in boiling water for a few minutes.


Installing rubber grommets couldn’t be easier. If you need high quality rubber mouldings such as grommets, just call Coruba on 01702 560194. You can also email us at info@coruba.co.uk.

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