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Monday, May 16, 2011

How to repair a crack in a stained glass window with epoxy

This is an excellent tutorial that even a non-stained glass artist can use!  So next time you find a wonderful stained glass window but you are hesitant to buy it because of a hair-line fracture in a pane or multiple panes,  at least now you can try to repair it yourself!   If done correctly, the epoxy will fill in the crack so that it will not be easily visible, plus it will strengthen the broken pane of glass as well.  



 
updated: November 16, 2010



How to Repair a Crack in a Stained Glass Windowthumbnail
Use specially formulated glass epoxy to repair cracks in stained glass.

Cracks in stained glass windows are sometimes difficult to repair without professional conservation procedures; however, for a stained glass window installed in a window frame and possessing only minor cracking, it is possible to repair the crack, at least temporarily, without dismantling the window. Using an epoxy commonly used by historical building restoration companies, the crack can be sufficiently repaired. According to the Building Conservation Directory, it is important to keep in mind that the epoxy used to repair the crack will break down in the sunlight over a long period of time.




Materials Needed:

Hxtal NYL-1 epoxy, or another UV light-resistant glass restoration epoxy
2 glass medicine droppers
Glass mixing container
Glass mixing rod
Self-adhesive forehead thermometer strip
Hair dryer
Toothpick or orange stick
Cotton rag
Razor blade

Instructions:

    • 1
      Mix the two parts, part A and part B, of the liquid epoxy by using glass droppers to add one part B to three parts A in a glass mixing container. Use a glass mixing rod to stir the two parts together. According to Talas, Hxtal NYL-1 is the only epoxy that won't discolor when exposed to UV light.
    • 2
      Stick a self-adhesive forehead thermometer strip onto the glass window near the crack so you can see the temperature of the glass.
    • 3
      Hold a hair dryer, set on a low heat setting, about 2 feet from the window glass. Heat the crack and the surrounding area to about 120 degrees Fahrenheit. Don't heat the glass quickly or let it get to a hotter temperature than 120 F. Gradually warm the glass.
    • 4
      Drop the epoxy into the crack using a glass dropper. If your window can be removed or can open at a tilt, this will simplify your repair, as you can drop the epoxy directly into the crack. If your window is installed upright, push the dropper as close to the crack on the surface of the glass as possible. Hold a toothpick or orange stick, a stick with tapered ends, beneath the crack and as you drop the epoxy, guide the adhesive into the crack with the toothpick or stick. Talas reports that the epoxy will soak into the crack very fast and will make finer cracks completely disappear.
    • 5
      Wipe away excess epoxy with a rag. Allow the repaired stained glass to sit undisturbed for at least 1 week. According to Talas, at a temperature of 75 degrees Fahrenheit the epoxy will reach about 90 percent of its bonding strength.
    • 6
      Scrape any excess dried epoxy from the glass with a razor blade after 12 hours have passed. Do not use any sort of cleaning product. After 24 hours, the epoxy can't be removed easily.




2 comments:

ARS (Architectural Refinishing Services) said...

this blog really good. i like this blog.thanks

Glass Repair

Samantha Gomes said...


what a great blog you have shared to all of us..i find your blog very interesting and its very informative..i was really glad that you have shared it.. window repair portland or

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