I have use of a huge 8' x 10' heated indoor spa with an insulated roll-up cover: https://www.canhottub.com/classic-covers/ Unfortunately the inner cover (foam insulation sandwiched between vinyl - I think) is deteriorating dropping very small black plastic flakes. Look like pepper flakes. I complained to the manufacturer who says tough s**t - must be chemical deterioration from improper chemicals in the spa (which I highly doubt). A replacement insulated liner runs about $700. Is there a flexible plastic/vinyl sealer I can use on this cover material? I believe I can cover the inner liner with mylar using 3M 77 adhesive but it would be nice to just coat it instead.