Good repairs show up again

[Steve]

Alot of times I will repair a chip and it looks great, completly filled. I will then remove the bridge and complete the repair but over the next several minutes some of the chip starts to show again, small black areas. On bullseyes sometimes a very small half moon type area at the bottom of the bullseye. This is very frustrating because I want to make the customer work very hard to find the repaired area (like Coitster). What am I doing wrong. I use the vacume stage several times, I'm very patient and perform the repair much longer than I need to. I don't think I'm using to much pressure on the seal, I normally use as little as possible. Maybe just more time and experience? I really want to do the best work possible.

[Delta Kits]

Steve,

If you're using our system, call us for tech support. For that matter, whichever system you're using, call them for tech support.

99 out of 100 times the situation you describe is caused by excessive heat. What happens is that with the heat, the windshield will expand, closing off some cracks, and not allowing you to even see them. You do your repair, everything looks great, then the windshield cools, and the cracks reappear.

Also, like you mentioned, it could also be head pressure on the glass from the injector.

But, in any case, whichever manufacturer you use should be able to go through the steps over the phone to see what is causing your problem.

[Mikedoby]

Steve, Let us know what the factory tech services desk had to say about your re-apearing problems. I agree with Jeff, it does sound like a heat problem. Was the glass hot to the touch when you attempted to do the repair?

[screenman]

Was there any chance of moisture in the damage before you did the repair
did you dry it and allow the screen to cool. One of the biggest causes of bad repair I have found is the dreaded moisture.

[GlassStarz]

Are you curing under pressure???

[CPR]

Try curing under pressure with a hot windshield.

[Delta Kits]

Try curing under pressure with a hot windshield.

Any repairs on a "hot" windshield can cause this, but especially curing under pressure.

If you think you need to cure under pressure, then the break just isn't filled yet.

[GlassStarz]

Or maybe its the same as a spider you look at it it looks filled but later it doesnt? I usualy leave the injector on a couple minutes after it looks filled and yes I start the cure under pressure then remove the injector after a minute.

[Steve]

I'm aware of the problem heat can cause. I was working under an ez-up tent, people would pull in, roll windows down and turn the a/c onto the glass. Sometimes the glass was slightly warm when the repair was done and sometimes cool but never hot. Moisture is a possibility because of the amount of rain we have been having but as hot as it has been I thought everything would be dry after about a day, maybe not. I'll try to let off the head pressure but I don't think that was it. By the way I do use Delta.

[screenman]

from my limited experience (see below ) I would consider most damage still wet even after three days of clear blue sky after rain. Dry out everthing for perfect results.