Long crack more crack

[Mr Bill]

Sou you popped it. Okay. Wat the crack all dry? Are you sure that any moisture did not run from the crack into your newly popped bull's-eye?
As you know: moisture is killing. And what resin did you use?

It didnt crack out. It looked fine.
I am just wondering if anyone has a problem with cracks getting longer several weeeks or months after the repair.
I normally dont do them because I fear that the damage may grow after a few months, so I figured I would ask forum members if they had any bother with cracks getting bigger.

[Frank EU]

Bill: the last one that cracked out on me was last Januari, here in Holland. It was on a RV windshield and I didn't like it at all.
It cracked some three days after I repaired it, the crack was aprox 13 inch long.

[Frank EU]

The good thing is though, I did not charge anything for this.
So there was no need to refund any monies.

Again: we typically do not touch cracks,
1 because we don't like it
2 because we feel that it is not in our favour (revenues / time and hassle >how many ''normal'' repairs could have been done in the same time?)
3 because a crack is, usually, the result of a not timely repaired chip. So, in our opinion....why bother with it.

[GlassStarz]

Here in the USA you can buy most windshields for around 200 bucks doing a proper long crack repair is time consuming and uses a lot of resin really cant charge enough to make it worth your time. For the big busses and trucks with expensive windshields our DOT forbids it for commercial vehicles and combine that with the fact that a little flex and most are going to fail its just not good buisness in my opinion

[pickmaster60]

I have been using GT's CR resin and have been having better luck with that resin then any other on the market. Yes even Delta. ( I can talk privately on that last line)

It's weird that you mention their resin because we got some samples to try out and the results did not come close to the resin that we currently use. I asked how are my techs going to know which resin to use and why below is the response that I was given.

The low viscosity resin should be used in the winter for all breaks
The medium viscosity glass repair resin should be used for bulls-eyes and combination breaks in the temperature range of 65-85 degrees F
The high viscosity glass repair resin should be used for hot weather for bulls-eyes and combination breaks but you can not use it the cracks exceed 1/2"
They have a long crack resin but no details on how to use it
The medium viscosity pit filler is used to finish all repairs
The high viscosity pit filler is great for filling and capping any star, bullseye, or combo break

I asked my current supplier about their resin and this is the response I was given.

Our resin has a high bonding strength and a viscosity of (15cps), it cures fast, and it perfectly matches the refractive index of the glass. It is suitable for all weather conditions and can be used for any type of windshield repair.

I like to keep things simple for my technicians and there is no reason to spend extra money on different resins. In addition they did not out perform what we are currently using so I would have to disagree with your comment.

[just chippen away]

That is your choice.... I will not get into it on the forum, but try them for what they are used for you you MIGHT see a difference.... You can PM or email me if you feel like it and I can help you our if ONLY if you want....

I am not going to talk about anything on the forum about my views.

[just chippen away]

the only thing I will say is don't even bother using the HV unless it is 200deg.... I do not even buy it.

[Frank EU]

It is not a weird idea to come up with different viscosities at all.
That being said: we were trained, 15 yrs ago, with the concept of several viscosities (GW), so we are used to it. In my opinion it does make sense to use a thicker resin in the summer (helps to prevent flowering etc.) and when doing cracks (helps to prevent air bubbles entering the repaired but yet uncured area).
And a thinner resin in winter times just to make the flow easier.

At the end of the day it doesn't matter all that much.
I know that most people just use one resin and that most professional, honest and hard working people want to, and indeed do, perform good quality repairs.

No matter the resin, no matter your supplier, no matter the type of break, DRY IT OUT before you start the repair. Anywhere, all year round, 24/7.

Back on topic.
I personally would use a thicker resin when doing cracks. But that is not a very likely event to happen for the reasons I explained previously.
GlassStarz has a point: it takes too much time (and material). Why bother?