Is heat sealing the inner wrapping important?

One of the most common cover fails is when the foam core absorbs too much moisture. It caused the cover to become much heavier plus reduces the cover’s ability to insulate. The inner foam is wrapped in heat-sealed plastic (usually 4mm-10mm) to protect against moisture absorption. It’s very important that this foam core is sealed properly.

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Hot Tub Spa Vac
The Hot Tub Vac
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