Glass rattling, gasket shrunk back from the corners, or rain getting in round the glass? Wedge gasket is the glazing seal pushed in between the glass and the glazing bead (or frame) on many uPVC and aluminium double glazed windows and doors. It packs the glass tight and seals it. We stock Reddiplex corded, incremental, Reddiglaze, Reddilock and tear-off wedge gaskets, plus sample packs to match your profile.
The correct profile and thickness matter: too thin and it won't seal or hold the glass; too thick and it won't go in. Match the existing gasket, or test with a sample pack first.
Corded wedge gasketsReddicord profiles 
Incremental wedge gasketsTPR incremental profiles 
Reddiglaze wedge gasketsTPR glazing wedge 
Reddilock wedge gasketsPVC wedge profiles 
Tear-off wedge gasketsAdjustable tear-off stripsPull a short length of the old wedge gasket out from between the glass and the bead and look at its cross-section.
Measure the gap between the glass and the glazing bead. This sets the thickness of wedge you need.
Check the shape of the fixing leg and the sealing face against the product diagrams. Reddiplex profiles are identified by R-numbers, such as R6503 or R3231.
If several profiles look similar, a sample pack lets you test them in the frame before buying a full length.
With the glass and beads in place, start at a corner and push the wedge gasket into the gap between the glass and the bead (or frame), working along each side. Don't stretch it as you go: stretched gasket shrinks back later and leaves gaps at the corners. Leave a little extra at each end so the joints are tight, and trim neatly.
Test before you order a full length: corded wedge sample pack, incremental wedge sample pack, wedge gasket sample pack, Reddilock sample pack and tear-off wedge sample pack.
It is a glazing gasket that wedges the double glazed unit in the frame and seals between the glass and the glazing bead, keeping water and draughts out.
Older gasket can shrink with age and sunlight, especially if it was stretched when fitted. Replace it with the same profile, fitted without stretching.
No. Wedge gasket seals the glass. The seal round the opening sash is a weather seal, usually a bubble or flipper gasket. See our gaskets and seals range.
Measure round the glass on each side of the window or door that needs it and add a little extra for the corners and trimming.
Not sure which wedge gasket you have? Send us a photo of the cross-section with a ruler in shot and we'll find the closest match.
Send us a photo to identify your partMonday to Friday, 8:30–12:30 and 13:00–15:30
