Replacement Seals

Extrudaseal is a leading supplier of replacement seals and gaskets for the glazing industry. We have more than 600 designs of seal in our range, suitable for aluminium, timber and uPVC glazing frames and bi-folding doors. We are a UK leader in producing flexible extrusions and seals in a wide range of compounds, including TPE, TPU, PVC nitriles and a range of other materials.

Whilst replacing glazing seals is a relatively simple task, we recommend that you have your seal correctly matched by Extrudaseal, as finding the correct replacement seal is by far the most difficult part of the job. Our experienced team will try their best to find an exact replacement seal, however, if we cannot find an exact match, we will always strive to find you a suitable alternative.

In addition to standard white, unlike many systems companies, Extrudaseal can also produce replacement seals in silver grey, brown and caramel to suit your requirements.


Types of seal in common use

Bubble, Flipper and Bubble-flip seals are generally the easiest glazing seals to replace; the old seals can simply be pulled out and replaced with the new seal. To install the replacement seal, from the top centre of the frame, push the seal into the gasket groove, working the seal all the way round the frame until you get back to the top centre.

It’s important to note that extra care needs to be taken at the corners of the frame to ensure that the new seal is properly located. Replacement seals should never be stretched during installation, as it will pull back over time, leaving a gap where the two ends of the seal meet and as a result, the seal is not effective.

Wedge gasket seals are also relatively easy to replace. Taking care not to damage the frame, you can lever out the old seal at the ends, removing the rest by hand once a little of the seal is free. It’s important to note that you should only remove one of the four lengths of glazing seal at once so that the tension on the beading on the other side of the glass unit is maintained. Removing all of the gasket at once can cause the beading and in some cases, the glass unit to fall away from the frame.

All replacement wedge gaskets should be cut oversized by around 5%. This allows for shrinkage of the gasket over time.

‘E’ gaskets are the most challenging glazing seals to replace as they are clipped into the frame. Freeing the old seal will usually require the removal of the beading from the frame, and sometimes the double glazing unit.


If your glazing seals have failed and you are in need of replacement seals, call us on +44 (0)121 356 8733 or email us at to find out more about our free matching service.

Click here for more information on replacement seals.