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How to Replace Rubber Seal on Upvc Windows

How to Replace Rubber Seal on Upvc Windows

Posted by Nathan on 21st Sep 2021

How to Replace Rubber Seal on Upvc Windows

In this blog we're going to learn how to replace rubber seal on uPVC windows.

The first thing you need to know is what type of gasket is currently installed in your window. Typically you will find that your window has either wedge gasket seal or rubber gasket seal - Or a combination of both.

Bubble Gasket Seal

Bubble gasket seal is installed around a window opening and around the glass. It has either a round or oval shape bubble and an arrowhead to help keep it in place. This seal is what help keeps the draughts and cold out of your home and replacing it can make a very big difference.

Here is an image of what a bubble seal might look like.

how-to-replace-bubble-gasket-seal.jpg

Replacing a bubble gasket is a simple task, but you need to make sure you use the correct size seal. Picking the correct seal can be very difficult, but this is what we suggest.

The best way to find the right size is to obtain samples of rubber seal and test them in your upvc windows. An important thing to remember is the seal doesn't have to be the exact same as the one you are replacing. You can use a seal which looks a little different. Just make sure it provides a good seal and the arrowhead is large enough to hold it in place.

At GB DIY Store we provide sample packs of seals which come labelled with our product codes. This makes it super easy for you to select the correct size. You can view our range of bubble gasket seals here.

Now that you have your replacement bubble gasket rubber seal installing it should be a cinch. This style of rubber seal just pulls out with your fingers and can be installed in the same way. Make sure to complete all four sides of the upvc window in one length. You may have some difficulty in the corners where the seal is quite tight. If this happens just cut away a small section of the arrowhead in the corner.

That's it, your new bubble rubber gasket seal should now be installed.

Wedge Gasket Seal

Wedge gasket seal is found installed around the glass but isn't used on all windows. It's primary use is to wedge your glass in place. If your wedge gasket seal on your upvc window begins to perish this could cause compression issues, leading to broken down glass units.

Here is an image of what a wedge seal might look like.

how-to-replace-wedge-gasket-seal.jpg

The best way to find the right size is to obtain samples of rubber seal and test them in your upvc windows. An important thing to remember is the seal doesn't have to be the exact same as the one you are replacing. You can use a seal which looks a little different. Just make sure it holds it's place firmly and isn't loose.

At GB DIY Store we provide sample packs of seals which come labelled with our product codes. This makes it super easy for you to select the correct size. You can view our range of wedge gasket seals here.

Now that you have your replacement wedge gasket seal installing it should be a cinch. This style of rubber seal will require a scraper to help pry the old one from the window. Installing the new one can be done by just pushing it in with your fingers. If you find it difficult to push in, spray some water on the face of the glass to help lubricate the area. You will need to install this gasket in four sections - One for each side of the window. When cutting each length make sure to cut it about 1 cm too big and push the extra seal into the window. This will counteract any shrinkage issues over the years.

That's it, your new wedge rubber gasket seal should now be installed.

If you have any questions please don't hesitate to contact one of our team. We're always happy help.