What a great idea! While looking it up I found a similar product that might work even better called FormCard that gets soft in hot water then sticks to other plastics as it cools and hardens. Not sure how it would do in a hot car but then I would not want to leave my batteries in a hot car either.I used pcl plastic for mine.
You can buy it brand name insta morph. Can be colored. Heat it in boiling water shape it how you like.
I think it's the same. Just coming in different form. Pre colored is nice.Amazon.com: Moldable Plastic Form Card[6 Pack], CloudValley Friendly Polymorph Plastic Glue Handy Pocket Sized thermoplastic Sheet/Mould/mend/Make - Black & White
Shop CloudValley at the Amazon Arts, Crafts & Sewing store. Free Shipping on eligible items. Save on everyday low prices.www.amazon.com
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