6mm Wedge Compression Back Gasket Double Glazing Rubber Seals

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GASK-WEDGE-6mm (W406) (5055621408051)
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  • 6mm Wedge Back Gasket for UPVC Windows and Doors.
  • 6mm Wedge Back Gasket for UPVC Windows and Doors.
  • 6mm Wedge Compression Back Gasket
  • 6mm Wedge Gasket
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6mm 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 £1.15
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11 Reviews

  • 5
    6mm Wedge Gasket Glazing Rubber Seals

    Posted by Paul on Feb 27, 2020

    Had to replace all of our window seals as they were brittle and letting in the cold from outside. These 6mm wedge rubber seals fit perfectly in our windows, ordered the sample back so we could easily check so we made the right choice in size. Would really recommend buying from them, excellent service.

  • 5
    Good quality

    Posted by Thomas Preece on Oct 31, 2018

    Easy to install and good customer service.

  • 4

    Posted by Unknown on Oct 05, 2018

    I used this seal for a aluminium patio door as the original seal kept falling out. Although the cut out for the locking bead was a bit big as it is meant for plastic frame it still locks in place and stays in place.

  • 5
    6mm gasket

    Posted by Christine on Jun 06, 2018

    Not the same as original gasket but did the job. Bought sample pack first. Excellent service . Ordered over phone. ,staff very polite,quick delivery

  • 5
    6mm wedge gasket

    Posted by MR ARTHUR JEFFERY on Apr 23, 2018

    reglazed my ageing conservatory i have been trying to get the right gasket for some time this fits perfectly excellent product

  • 4
    Double glazing wedge seals

    Posted by T2 on Feb 02, 2018

    Bought these seals to replace old shrunk versions. Started off being a bit tight to fit as they are slightly different profile - the existing version being very old -
    but once I got the hang of it they provide a nice clean seal in the windows. Much better appearance too.

  • 5
    Ideal for replacing the cracked white seals

    Posted by Paul Airey on Apr 24, 2017

    Excellent service, sample pack essential

  • 5
    6mm Wedge Compression Back Gasket

    Posted by Dave on Mar 30, 2017

    replaced old gasket no problem, quick delivery, very helpfull staff when you call

  • 5
    great gaskets

    Posted by Unknown on Nov 07, 2014

    Good quick delivery and a great product

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