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.
You would want a chlorine bound plastic sealer that is flexible. I know of no such product, and even if one were found, getting it to bond with your cover would be another issue. I suspect that the cover is not made of vinyl, even if it is advertised as such. I have never seen PVC deteriorate in that situation unless mold is growing on it. If PVC cement will soften the material you have, scuff it up with a scotch pad and glue a piece of real PCV vinyl to the underside.
Looks like you got hosed by them hosers in Canada got any pictures of the cover and issue you mite try flex seal.
You could add a layer of material to it. What is the Width of the cover? We use material like that for heavy truck tarps. Adhesive we use is https://www.tarpstop.com/vinyl-glue...MI2pSRj5P12gIVE9VkCh2GagAdEAQYAyABEgK_FPD_BwE
No mold! Dimensions are 96" by 144". I was thinking of adding a layer of polyester (PET or PETE) film using 3M 77 spray adhesive. I tried a small spot and it does seem to stick well. One question though is the weight of PET. 0.005" is reasonably priced but no more than 40" wide. Still I don't know if I could handle any material a full 96" wide.
The vinyl they show in the video looks like the type of vinyl material used on old car vinyl tops. Does it look like this? https://www.macsautoparts.com/ford_mercury_early/exterior-parts-and-trim/closed-car-tops.html If so, that material won't hold up to a Hot Tub environment.
Solved the problem - for now. I posted a bad review for the company and now they want to send me a free replacement spa cover provided I remove the review. I agreed - once I have the replacement in hand.
