Windshield Repair Forum

In an effort to improve on my large pit combo repairs I decided to play around with this holed suction cup to use with with my mighty vac just as some of the older repair techs used to use and here is what I discovered.
a)This method actually works quite well as apposed to filling the large pit with resin,curing,then drilling through it and making the repair as I always seem to trap air pockets.
b)You can pull a mean vacuum with that mighty vac on these repairs.
c)This method is not as effective on small pit repairs as compared to an injector because the suction method has no way of forcing resin into the repair except atmospheric pressure.
d)resin wastage is slightly higher.
e)A little heat seems to help out with this method also.
Conclusion....
On bulls eye and combo repairs where the impact crater is larger than the injector seal I will now be including the suction cup/mighty vac repair option in my kit.Oh and I tried one of those large pit adapters a few years back but with no real success.
Anybody still useing some of these older repair methods??

I still have great success with the large pit adapter. It allows more pressure by the piston without leakage beyond the O ring.

when i repair a stone chip,star,crescent,bat wing etc...with a large impact area i simply place pit filler over the hole.I try to cover all the "chip hole".I recomend a pit filler with a good viscosity.I use 3800 cps.Cure the impact area with a square rigid film.Next drill a hole on the center of the impact point without scrape anything.Place the piston over the small drill hole with the proper resin and begin to create vacum and pressure.I use this method over and over again and believe me i dont need to place the large pit adapter.With only the small piston o ring i can fix the chip with more pressure by the piston without leakage beyond the O ring.I believe this method also save me some resin.Thanks for the attention.Good luck!

Any body else still using the old methods in some situations??

I agree with windshield on this one. We have played with large pit adapters and vacuum pumps a lot over the years and have found that they decrease efficiency, at least when using Delta Kits windshield repair equipment. Using large pit adapters also increases the amount of resin necessary to fill a break and utilizes an o-ring for the seal. I wish o-rings worked well for an end seal, but they require too much pressure against the glass to seal properly.

Again, I can only speak for Delta Kits windshield repair products, although we have had a lot of people trade in competitor equipment because of seal issues, so I think it is safe to say that the end seal has a great deal to do with how well a break fills regardless of the system used, and the vast majority of technicians that come to our training classes struggle with vacuum pumps and large pit adapters.

I will say that Delta Kits has done a great deal of research over the years and have found that for the most part all the new bells and whistles featured on modern windshield repair systems have not improved repair quality, so if old school is giving you better results with the system you use I say go for it.

At the end of the day it's all about the results.

The vac pump and holed suction cup method will be strictly for large crater type breaks where proper end seal contact cannot be made only as it does use a little more resin per repair.