When I think it is necessary to cure under pressure, I proceed in this manner:

I take a curing tab, cut a hole in it and put it in place around the injector with a drop or two of practice resin (sample resin that didnt pass muster with me), and cure it either with the curing lamp or with sunlight. When this is cured, then I remove the injector and fill the pit & scrape the whole thing off once the pit fill is cured. I achieve consistantly good results with this method. Try this on a practice windshield and see if it works for you.

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