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Originally Posted by taco.vidal
What's your source on this? I have never heard such info. A quick google search shows that quite a bit of discussion around this that predominantly indicates there is no issue with freezing. I have also come across multiple manufacturers websites that address this issue in their product instructions or faq and jndicate that freezing should cause no significant deterioration to the product.
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It could be just a legend. It is in our safety manual, but that doesn't mean it was sourced.
Anecdotally we had someone test the theory this year and sprayed a can that had sat out all winter against a new can and the range on the new can was about double.