Darryl Keil
Posts: 1445
Joined: 2003-05-22
Location: Maine
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Carl, there is a phenomenon where a vinyl bag left in rolled up closed storage for a long time can sometimes produce this “gooey” substance that precipitates out to the surface of the vinyl. Your bag is not actually dissolving. It appears to be very random, only on vinyl, and only on bags rolled up and stored away. I have not found a satisfactory answer for this condition from the vinyl manufacturer. I also have never gotten a bag like this in hand that I could send away to get analyzed. I do know the simple answer is to keep a vinyl bag being stored a long time loosely rolled up and out in the open, meaning not in a sealed box. The reports are that denatured alcohol and I think, naphtha, will clean off the “goo”.
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