Mending Broken Glass

Remove old panes & putty, cut & clean glass, putty & paint.
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Mending Broken Glass

Postby johnleeke » Fri Mar 15, 2019 6:17 pm

It is possible to glue the edges of broken window pane glass back together. It takes a special adhesive that has the same refractive index as glass, so that the glued line does not show.

Try LocTite Glass Glue. Readily available, low cost, refractive index similar to most window glass so joint is not so apparent, quick cure time, actually works. ... s-Glue.htm

I've used it by setting the two pieces of glass in the bedding putty with the broken joint slightly open, then applying the glue, then moving the two pieces together, adjusting the two pieces of glass optically to get them in the same plane, letting the glue set for 20 minutes, then finishing the glazing. First use in place for about 20 years, still holding up.

Another glass adhesive is Hxtal, available at which is a conservators supply house. It is somewhat tricky to use as you have to be accurate with the part mixture (mixed by gram weight). so it takes a special scale to weight that out. It also takes a fair amount of time to set up. You will need the release tape also. It isn't cheap but with the small amount used to repair glass, one bottle will last a lifetime.

Another product from Delta Kits is MagniBond Resin:
where they specialize in auto windshield repairs The 1/2 ounce bottle of adhesive costs about $35. It cures by UV light, either from a special UV lamp, or by setting the repaired glass in the sun for curing.

If you are interested in more on this method, post a message below and I'll provide step-by-step instructions with photos.

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