5mm Wedge Compression Back Gasket Double Glazing Rubber Seals

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GASK-WEDGE-5mm (W405) (5055621408044)
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  • 5mm Wedge Back Gasket for UPVC Windows
  • 5mm Wedge Back Gasket for UPVC Windows
  • 5mm Wedge Compression Back Gasket
  • 5mm Wedge Gasket
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Frequently bought together:


5mm 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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12 Reviews

  • 5
    5mm Wedge Compression Back Gasket

    Posted by Roy Barton on Apr 03, 2020

    Excellent product

  • 5
    Excellent replacement.

    Posted by v symcox on Aug 11, 2019

    Easy to compare on website. Efficient staff. Delivered promptly.

  • 5
    5mm Wedge Compression Back Gasket

    Posted by John Jutson on Apr 22, 2019

    Good value fits well

  • 5
    Replacement double glaxing seals

    Posted by Phil Kempster on Mar 15, 2019

    Excelkent service, from ordering the sample kit to ordering the identified seal needed, prompt service and very easy to replace all shrunk seals on two very large windows.

  • 5
    Good replacement

    Posted by Andrew Spencer on Feb 21, 2019

    Exact replacement for the old rubber gaskets in the windows. Easy to fit

  • 5
    Window gaskets

    Posted by Steve on Jun 15, 2018

    Fast delivery and good product

  • 5
    Fitted the bill easy to fit I have repaired and replaced all seals in a day! arrived soon after ordering.

    Posted by rodbennettuk@yahoo.co.uk on Feb 13, 2018

    Good service

  • 5
    trial order - very effective.

    Posted by peter stevenson on Dec 16, 2014

    I ordered 8 items in "trial" volumes and was very pleased at the quick response and helpfulness.
    This item was one of 3 (out of 8 assorted needs)which proved fittable on my windows.( I realise with the huge variety of makes compatible spares are difficult to find but this was a useful service)
    Thanks Will follow up with an add on order for the suitable items.

  • 5

    Posted by Unknown on Jun 04, 2014

    I'm very happy with product

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