We recommend the use of the Glazing Tool GT75 to fit the filler strip. Please see our eBay shop and other listing to purchase this item.

The extruded rubber section has 3 recesses. One for the window, one for the panel and the third for a filler strip, which is used to lock the rubber seal against the window and the panel to ensure a good weatherproof fit. It is necessary to have the correct size seal. This can be determined from the.

Removing the Old Window
Locate the ends of the filler strip and hook them out. Then remove the strip all of the way around. Push the window firmly in the middle. It should come out of the rubber quite easily. Be careful not to break the window, as you may need it for a template for a new one. Remove the rubber seal from the panel and clean the area where the seal has been.

Fitting the New Seal
Fit the rubber seal around the aperture pushing it well into the corners to determine the length required. Cut the rubber approx. 25mm over length (depending on the size of the window) with good square joints to make a really tight butt joint. Remove the seal and apply a small bead of silicone sealant into the panel groove (if required) and then refit the rubber around the aperture, ensuring that the butt joint is at the top (for boats) or the bottom (for automotive and caravans).

With the rubber in place apply a small bead of silicone (if required) into the window groove. Push the window into the rubber seal at the bottom. Using the glazing tool work the lip of the rubber over the edge of the window.

To fit the filler strip, feed it through the eye of the glazing tool and then work it into the channel in the rubber seal. Use plenty of lubricant to ease fitment. Start with the joint at the top or bottom (opposite that of the rubber section). Be careful not to stretch the filler strip as you go, otherwise it will shrink back at a later date. Cut the end with a few millimetres of overlap and push it into the groove so that it butts the other end with a tight joint.

We are also able to supply lots of sizes of window rubber. Please see or other listings or website for details.