Windshield Repair Forum

I have seen a lot of repaired cracks that the customer said was clear but now is filled but it looks white. well im thanking that it,s the resin some one was using. i have cracks i have repaired from up to a year ago and thay dont look this way. so did the glass seperate or is it cheap resin? i use delta.

For starters, you could start with some resin that is specially designed for cracks.

delta Premium Bond is for cracks and will not turn white over time. and none of the cracks i have fixed have turned. wilz thanks for the input.

This is the reason I switched to a thicker resin for long crack repair. I don't care what a windshield repair manufacturer tells you. If you are using the same resin to fix long cracks as you are chips it just won't hold over time. It doesn't have enough bonding agent to hold up to the stresses. I know this is a touchy subject and everyone will stand up and say our holds. Its just not true, I may not be polular for saying this but listen to the pros on this. You need a very thick resin to hold up for a long crack repair. Do some research on the web and do searches for long crack repair resins and you will find them. Again chip resin will not hold up. Now I am sure many people are going to chim in that don't do long crack repairs for a living and give their two cents but trust me.
David
Coitster

Thanks coitster, that’s what I was looking for a intelligent and reasonable answer. I know this is crazy but I did try some plate glass resin. Well it did not work very well, way to thick. But what I have seen from some crack repairs makes me want to make sure the same thing doesn’t happen to my customers a year or two down the road. So far the ones I have seen from my old customers have been good. Have any cps rating your would recommend. Now the temp here in the summer gets in the high 90,s. Thanks again. Texas Jim

coitster wrote...

You need a very thick resin to hold up for a long crack repair.

Just for giggles, a long time ago I repaired about a 30-inch crack in a practice windshield using Glass Mechanix PIT-FILLER. It actually turned out better than any other resin I used at the time. I can't say that it would be a wise thing to do on a customer's windshield because I don't know what the long-term affect would be on the repair (good or bad?) But it did turn out completely filled and almost un-detectable.

Texas Jim,
Well it depends. As you travel down the length of the crack, from the edge of the windshield to the tip of the crack you will find that the stresses of the crack change. As you get to the tip (where you are drilling the hole to stop it) then a thin resin of about 50+ CPS will work fine. Its kind tight so you need a thin resin, however as you get a inch or so away from the tip you will need something over 150 cps to hold. Also as you get to the edge (heres the really stressed part) you will need something over 700+ cps. Chip resins are under 100 cps so those won't work.

Also it depends on how bad your winters are. If you are in the north part of the country and have really harsh winters then you will need something in the order of 2000+ cps. In Texas where I used to do lots of repairs 700+ cps is fine. Special note here. There are several companies that sell resins that are this thick however because they are so thick you might have to use a primer to get the resin to bond and flow into the break. I only use a primer on the area where I am using the 700+ thick resin.

Hope that helps.
David
Coitster

Coitster;23656 wrote:This is the reason I switched to a thicker resin for long crack repair. I don't care what a windshield repair manufacturer tells you. If you are using the same resin to fix long cracks as you are chips it just won't hold over time. It doesn't have enough bonding agent to hold up to the stresses. I know this is a touchy subject and everyone will stand up and say our holds. Its just not true, I may not be polular for saying this but listen to the pros on this. You need a very thick resin to hold up for a long crack repair. Do some research on the web and do searches for long crack repair resins and you will find them. Again chip resin will not hold up. Now I am sure many people are going to chim in that don't do long crack repairs for a living and give their two cents but trust me.
David
Coitster

I think the BSI testing on long crack strength of our MagniBond (http://www.deltakits.com/files/bsitest.pdf) and Delta Kits would have to respectfully disagree with you David. As well as thousands of customers. To each his own though, I respect your opinion!

Jeff,
I am sure you and all the other manufactures of chip resin would disagree with me. I have used your resins for crack repair and found them great for chip repair, but not for long crack repair. I am just stating my opinion. All I can go off of is my experiance.
David
Coitster

Jeff, what type breaks were tested (bullseyes, star, combo, long cracks)? I've read the test results but don't know the type of breaks you were required to fix.