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Tape is one thing this stuff is ok at best. I would never apply this to the underside of a car unless it had screen floor panels. I have Jerry Feather's liners and they are great. I'm not going to say they see much weather, but they have been in place for at least 5 years and seem good as new.
Just spray the liner after clean up with Flex Seal. I put on three light coats. You can see it start to fill the cracks. I’ll take a look again tomorrow and add a couple more coats to make sure the cracks are filled and flush with the surface.
First spray pass psd end First spray pass front end Third spray pass psd end Third spray pass front end
I’ll update tomorrow after I see how “firm” the coating sets up
Put as many coats as you can but make sure the liner is still very flexible for reinstallation.
I tried the same approach but with "LineX".
The finish product was perfect, but... Way too stiff to put back in the wheel well.
Bertrand, thanks for the feedback. I checked this morning and the sides seem to still be flexible. I am trying to fix the big crack at the corner this morning. Sprayed another coat to try now to completely fill the cracks, if it were not for the foam insulation on the back, this liner would have been in pieces.
Taped the corner together from behind to pull the crack tight and will spray this morning.
Sprayed the large crack, seems to fill in well. If this “sticks” well to the liner, and not pull off when installing back on the car, it might just work....
Bob, on that corner crack: I suggest that you, on the back side, mask off the foam, and spray the back-side area that isn’t ‘protected’ with foam. The inner vertical (as installed) surface has no glued-on foam to hold it together. After the two ‘pointy ends’ of the liner go, that inner surface goes next. Flex Spray on both sides where there’s no foam and bare plastic ... whatever that stuff is ... seems like a good idea.
Dave, got it! Also thinking after that to pop rivet flex pvc around corner ( liner around to foam area) to make sure it doesn’t reopen. I taped the back now to hold the crack together while I am applying the flex seal....maybe we can have a new commercial for these guys.. I’ll have to see how it hold after it cures complete. Seems to still be flexible, but time will tell..
I tried it a few years back but it started to melt in the TX heat and made a heck of a mess.
Just replaced with new liners and good for another 30 years.
I know they are not cheap but at least they are available 91 & 92 to 95 and made of much better material.
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Why not just lay down a layer of fiberglass and epoxy resin? I’d go with a 10-12 oz cloth, seeing how it feels and adding a second layer of equal or lesser weight if needed. It’ll permanently repair those cracks and still retain very close to the original flexibility and stiffness of the plastic. I am highly dubious that spray on anything is going to be a long term solution. Sand the plastic first, perhaps 180 grit, and wipe down with acetone before glassing. And don’t use a polyester resin as it would probably melt the plastic. If you want perfect, use a spray on primer after, sand fill and repeat until the weave is filled then spray flat black. I’ve done a lot of glasswork this looks very straightforward. Anyway good luck, seems to me definitely repairable!
04-21-2019, 06:18 PM
91+ rear liners; anyone tried “Flex Seal?”
I’ll have to see how it hold after it cures complete. Seems to still be flexible, but time will tell..
George Layton March 2014
