Pushes into the existing groove, no glue needed, and seals gaps of 3 to 5mm.
This Stormguard bubble-profile seal is sold in a 25m roll for fitting to uPVC and similar frames. It fits grooves between 3.2mm and 4mm wide and seals the gap between the frame and the sash when closed.
A 25m roll of black Stormguard bubble-gasket replacement seal for uPVC windows and doors. It fits grooves 3.2 to 4mm wide, with no glue, and seals gaps of 3 to 5mm.
About this window & upvc seals
A bubble gasket has a hollow rounded section that sits on a thin rooted stem, which locks into a groove in the frame. As the window closes, the bubble squeezes against the sash and closes the gap. It is the shape used in a huge number of uPVC windows, which makes a replacement of the same type the simplest fix.
The Stormguard roll is 25m long in black, so you can re-seal an entire house worth of frames from one roll. It is intended for grooves between 3.2mm and 4mm wide and for gaps of 3 to 5mm between the frame and the sash when closed. Because it is pressed into the existing groove, it needs no glue.
The supplier asks you to check that the sizes in the diagram match the seal you are replacing, and that is good advice. Measure your groove, compare the cross-section and make sure the bubble faces the correct direction. A perfect profile match is what makes a replacement seal feel like new.
The details
| Brand | Stormguard |
|---|---|
| Length | 25m |
| Style | Bubble gasket (frame seal) |
| Groove width | 3.2 to 4mm |
| Gap sealed | 3 to 5mm |
| Material | Rubber |
| Colour | Black |
| Weight | 0.93kg |
| Brand | Stormguard |
Stormguard 25m Black uPVC Bubble Gasket Seal
Free United Kingdom delivery · easy returns · secure checkout
Got questions?
Grooves between 3.2mm and 4mm wide.
No, it fixes into the existing groove of the frame.
The gap between the frame and the sash of 3 to 5mm when closed.
Compare your old seal and groove with the diagram on the product page before ordering.
Look at your existing seal or the gap around the sash, then compare the groove width and profile shape with the details on this page, because a seal that is the wrong profile will not close the gap properly.
Delivery within the UK is free on orders of £30 or more and a flat £3.99 below that. The delivery estimate for your address is shown at checkout before you pay.
The complete guide
Bubble gaskets are rounded and hollow. Fin seals have a thin flap. Blade seals are flat and wipe against the sash.
Pull a short length of old seal out and look at the cross-section against a bright light.
Pick the same family and then check the groove width. A mismatched profile may fit but not seal.
Other options in this range, in case another size, colour or style suits your door better. See the whole window & upvc seals range.
Stormguard 25m Black uPVC Bubble Gasket Seal (Stormguard) is sold at £42.99 with free UK delivery over £30. A 25m roll of black Stormguard bubble-gasket replacement seal for uPVC windows and doors. It fits grooves 3.2 to 4mm wide, with no glue, and seals gaps of 3 to 5mm. Length: 25m. Style: Bubble gasket (frame seal). Groove width: 3.2 to 4mm. Gap sealed: 3 to 5mm. Material: Rubber.
