4mm Wedge Compression Back Gasket Double Glazing Rubber Seals

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  • 4mm Wedge Compression Back Gasket Double Glazing Rubber Seals
  • 4mm Wedge Compression Back Gasket Double Glazing Rubber Seals
  • 4mm Wedge Compression Back Gasket Double Glazing Rubber Seals
  • 4mm Wedge Compression Back Gasket Double Glazing Rubber Seals
£1.43 Inc. VAT
£1.19 Ex. VAT


4mm 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

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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26 Reviews

  • 5

    Good quality seal, easy to use.

    Posted by Rob Pryke on Apr 15, 2024

    Good value with fast delivery

  • 5

    excellent product

    Posted by Micky Powell on Jul 03, 2023

    delivery was very prompt and the product in excellent condition.

  • 5

    4mm wedge seals

    Posted by Ian Wyllie on Mar 20, 2023

    At last what a service, from a sample set to the final order. Thanks all and recommend to ALL

  • 5

    Doss what it says on the tin

    Posted by Danny ayre on Jan 01, 2023

    Great quality quality item

  • 5

    Window rubber

    Posted by Carole Dixon on Dec 25, 2022

    Good item does its job

  • 5

    Gasket and service

    Posted by Kishore on Dec 06, 2022

    Gasket was perfect fit. Have ordered before and service is 5*

  • 5

    Thanks to Rebecca I purchased the correct product. Have used this company before and will continue to do so.

    Posted by Gaynor Boudidit on Dec 01, 2022

    Good co.pant to deal with ,would recommend

  • 5

    very good product

    Posted by Roger on Nov 06, 2022

    Using the sample pack beforehand simplified the work. Thankyou

  • 3

    4mm wedge compression gasket

    Posted by Karen Chapman on Jan 14, 2022

    This gasket was the same shape and width as was that already in place. However, it was so much smaller in height that I couldn't use it. Just glad that it wasn't expensive.

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