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May/June 2000

Expert Advice
pros who know


Hot Weather Recommendations

by Dave Shores


We are coming into the time of the year that most of us have dreamed about for many long cold months. The temperature is getting warmer, the days are getting longer and the ultraviolet (UV) rays are becoming more intense.

Every year about this time, I find a lot of people are having trouble getting their breaks to fill with resin. As we talk, I find that the break has been exposed to reflective UV, which cures, or at least partially cures, the resin before the break is completely filled.

The ultraviolet rays will reflect off most surfaces including building walls, cars and even your face or light colored shirt. When working for your fleets, dealers or in front of someone’s home, look around to see if the sunlight is reflecting from the glass on other cars or windows. You may even find that there is a reflection coming from the back of a mirror.

If you find that there is reflected sunlight, protect your repair to eliminate any chance for pre-cure of the resin. You can use sunshades or UV screens that are supplied by most manufacturers. I have seen many people using towels and rags to cover their injectors and bridges. Any form of protection is better than no protection at all.

Another thing to keep in mind during the hot weather is that you should not repair windshields that are hot. A hot windshield has more stress in it than a cold one, creating more of a chance for the break to spread. You might want to open the windows or doors to allow air to circulate through the car to cool the glass. Some technicians will start the car and turn on the air conditioning to cool the windshield.

I have heard technicians talk about how they use wet towels or water to help cool the windshield down. This causes one layer or the windshield to cool faster than the other creating stress in the glass. I would not recommend this due to the fact that the stress can cause the break to run.

During this hot weather, you might want to consider using a thicker resin and reducing the amount of pressure that is used during the repair process to help eliminate the chance of flowering. The resin flowing between the outer layer of glass and the laminate creates flowering.

Remember to pay attention to your surroundings when on the job site to reduce the chance of problems during the repair process. Enjoy the summer months, for they are in most cases our busiest time of the year.


wpeD.jpg (2679 bytes) Dave Shores is the marketing director for Glas-Weld Systems Inc., and serves on the board of directors for the National Windshield Repair Association.


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