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Old 09-16-2020, 05:14 PM   #1
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2018 19' Flying Cloud
Newport , Washington
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Cracked Window Rock Guard

My curbside window rock guard took a hit from a rock thrown by a passing car. There is a very small pin head sized chip on the outside. When viewed from the inside however, there are 3-4 cracks emanating outward. These cracks do not go all the way through to the outside.

I've searched and found multiple threads on the topic which contain conflicting suggestions for a cure. I have two questions:

1) If I do nothing are these cracks likely to grow? Previous postings are split about 50/50 on this question.

2) If they are likely to grow I will drill small stop holes at the end of each crack and apply a solvent to "weld" the polycarbonate. The question is what solvent would be appropriate? Some previous postings suggest acetone and other postings say that will cause the polycarbonate to shatter.

I don't have $600 laying around so replacing the panel is not an option.

Thanks for your thoughtful responses.....
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Old 09-16-2020, 05:32 PM   #2
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Following. Iíve one going too.
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Old 09-16-2020, 05:40 PM   #3
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I drilled the small holes then applied supper glue.
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Old 09-17-2020, 04:21 PM   #4
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Does anyone see a problem with using this stuff?


https://www.amazon.com/Weldon-Applic...0377618&sr=8-2
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Old 09-17-2020, 04:57 PM   #5
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Canyon Country , California
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possible to do Rock Chip repair at any auto Glass shops?
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Old 09-17-2020, 05:17 PM   #6
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First off, unless things have changed, they are not polycarbonate, but rather plexiglass. A long time ago, there was a discussion about replacing the smoked material only.....by buying sheets locally.

The debate was whether one could use polycarbonate, or would the bend result in breakage?? A large oven would help, but who has one big enough??

My star cracks have never run, and some are 7 or 8 years old. One of these days, I will procure sheets of plexi and disassemble the frames and replace. Conventional wisdom was that plexi can make the bend with some prudent heat gun help.
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