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How to know if your polyester resin is to old

3,121 Views· 27/04/19
twiper
twiper (@twiper)
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It is not always easy to know if the polyester you have on the shelf is to old or not. The resin must be clear and light and change color after one minute when the hardner is mixed, if it's thick and don't change color when the hardner is mixed it is to old.

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