3mm Wedge Compression Back Gasket Double Glazing Rubber Seals

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GASK-WEDGE-3mm (W403) (5055621408020)
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  • 3mm Wedge Back Gasket seal for UPVC windows
  • 3mm Wedge Back Gasket seal for UPVC windows
  • 3mm Wedge Compression Back Gasket
  • 3mm Wedge Gasket
  • 3mm Wedge Back Gasket seal for UPVC windows
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3mm Wedge compression back gasket

  • This gasket is only available in black.    

Wedge gasket is fitted between the double glazed unit and the upvc frame to hold the glass securely in place.
Over time these gaskets can shrink or perish and create gaps which lets in draughts and cold spots.
It is important to get the right size of gasket as too thick will put too much pressure on the glass (if you can even get it in) and too thin will not hold the glass tightly. It is more often found on externally beaded windows as it works together with the bead to push the glass into place and create a secure fit.

When fitting wedge gasket you can push into place using your fingers or if you are doing quite a large area you may find a gasket roller better to use. Gasket rollers are available on our site by clicking here


 As gasket is custom cut to the individual requirements we cannot accept returns.  If you are unsure which gasket you need then please use our gasket sample pack: 

Click here for sample pack



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Frequently Asked Questions

Frequently Asked Questions

You should order per meter and we will cut to length for you. As it is cut to length we cannot accept returns. If you are not sure which gasket you need then maybe try the sample pack first.

Gasket can deteriorate and shrink over time so unfortunately we can’t identify your gasket this way. We recommend purchasing our gasket sample pack to see which gasket fits in your frame the best.

It is possible that a different gasket may work in your groove. Therefore, we have the sample pack, so you can try them and see what fits.

Generally by pushing bit by bit with your thumbs. With some of the chunkier gaskets such as wedge gaskets it can be done a bit easier with a gasket roller.

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Additional Information

Wedge Gasket
Pack Size:
Sold By The Metre
Sold By The Metre
Delivered from just 88p
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21 Reviews

  • 5

    Posted by Mike Gardner on Jan 14, 2020

    As expected.
    Good product.

  • 5
    3mm wedge seal

    Posted by PAT DEMPSEY on Dec 19, 2019

    Good product, well priced, good service.

  • 5
    3 mm Rubber gasket

    Posted by Pete Gardner on Oct 21, 2019

    Excellent Product

  • 5
    3mm Wedge Compression Back Gasket Double Glazing Rubber Seal.

    Posted by John F on Aug 12, 2019

    Excellent. Pliable and easy to press into position creating a good seal.

  • 5
    3mm wedge gasket

    Posted by Bill Broad on Jun 10, 2019

    Brilliant, finishes the job perfectly. Just what I needed.

  • 5
    All good

    Posted by R swain on May 25, 2019

    Good product

  • 5
    window seal

    Posted by Allan McArthur on Mar 07, 2019

    Staff very helpful

  • 5
    window seal

    Posted by Allan McArthur on Feb 25, 2019

    Very helpful people. Quick delivery.

  • 4

    Posted by Stuart on Nov 19, 2018

    Easy to fit. Speedy delivery

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