You didn't weld the glass. You filled a void. Under thermal stress (a hot summer afternoon after a cold night), that crack can still propagate. The resin is a bandage, not a resurrection.
If the crack is long, you will watch the resin move. It is mesmerizing. It is also unforgiving. If you see an air bubble, tap the glass gently to coax it out. how to fix a cracked house window
The sound wasn't a shatter. It was a click . Then a single, elegant fissure arced from the bottom left corner toward the center, like a lightning bolt frozen in time. You didn't weld the glass
So clean the glass. Inject the resin. Cure it in the sun. And then, when you finally stop seeing the repair, you’ll remember that the purpose of a window is not to be flawless—it is to let the light in. The resin is a bandage, not a resurrection
Fill your syringe with resin. Touch the needle to the top of the crack. Do not press the plunger hard. You want capillary action to do the work. The resin should crawl down the fissure like a spider.
Shine your UV light on the crack for 2 minutes. If you're using the sun, cover the rest of the window with cardboard and leave the crack exposed for 10 minutes.