Quote:
Originally Posted by GlassStarz
The shade may work in places like Oregon but when the outside temp is 100 plus shade will only bring temps down to that and turning on the air inside often isnt enough I find a dilluted 20% solution of alcohol works for me I spray it on a paper towel and wipe the glass
It Works for me
The othe option is turn on the air and putt a big towel over the area it will keep the heat outside from keeping the air from cooling both layers. A combo of all these will work well
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I started in Eastern Montana where we got plenty of 100 plus temperature in the summer, and still found no need to use any liquids. Just a difference of opinion I guess.
I know the glass temperature is much hotter than the air temperature when the sun is beating down on it, but it also seems that the glass is cooler than the air temperature when it is shaded. I can't say I have actually done any testing to prove that one way or another, but it sure feels that way. As long as it is shaded I don't have any problems with the glass being too hot, but I agree that if possible it certainly doesn't hurt to run the air, or at least roll down the windows to allow the inside of the car to cool down, and I agree with placing a towel or an extra hood protector over the glass prior to starting the repair, and leaving it there throughout the repair process.
My reasoning for not using anything cold on a hot windshield is that my experience has been it can cause the glass to crack if it is already damaged. I've seen that happen mainly when I owned my pressure wash business, and had no choice but to spray cold water on hot glass, but I even had one experience when I put cold resin on a hot windshield and it instantly cracked all the way across. I have also received a number of calls from customers who have cracked windshields by placing wet wet towels to cool the windshield.
Obviously that has not been your experience, so maybe it is just my dumb luck. It sounds like you use a bit of caution with your method so I'm sure it works just fine, but it still makes me nervous.