Q-Lon Gasket

Q-Lon Gasket & Foam Weather Seals

Foam seal round the window or door squashed flat or torn? Q-Lon seals have a soft foam core inside a tough outer skin. They are used on many uPVC, composite and timber windows and doors.

We stock Q-Lon 4465 and 6571 weather seals per metre, and Schlegel Aquamac 63 Q-Lon QL3005 timber weatherseal in 6m, 10m, 25m and 300m lengths. For more timber seals, see our Aquamac gasket.

How to Match Your Q-Lon Seal

Cut a short piece

Pull out a short length of the old gasket and look at the end. The shape of the cross-section is what you need to match.

Measure it

Measure the overall height and width, and the leg or foot that pushes into the groove.

Compare the diagrams

Compare your piece with the product diagrams. Reddiplex profiles are listed by R-number, such as R6160.

How much you need

Measure round each window or door and add a little for the corners and trimming. Most gaskets are sold per metre.

Q-Lon Seal Guide

Q-Lon or Rubber?

Q-Lon is foam with an outer skin, so it feels soft and spongy. Rubber bubble and flipper gaskets feel solid. Check which you have before you order.

Timber Windows and Doors

On timber frames, Q-Lon seals usually push into a groove cut in the wood. Aquamac is a Schlegel Q-Lon range made for timber.

Frequently Asked Questions

Is Aquamac the same as Q-Lon?

Aquamac is a Schlegel range of Q-Lon seals for timber windows and doors.

How do I fit a Q-Lon seal?

Pull out the old seal, clean the groove and push the new one in without stretching it.

Browse all gaskets and seals: bubble, flipper, E gasket, wedge, Q-Lon, Aquamac, U-channel, threshold seals and draught excluders.

Not sure which gasket you have? Send us a photo of the end of a short piece of your old gasket, with a ruler in shot, and we'll find the closest match.

Send us a photo to identify your part

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