Door Plastic Membrane

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Mr Teddy Bear
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Door Plastic Membrane

#1 Post by Mr Teddy Bear » Tue May 23, 2017 4:23 pm

After you have removed the door card, then this plastic membrane is revealed it seals around the door edge using some sort of high build filler/adhesive. It can be peeled off to gain access to the glass/regulator etc and then reused.

Question is what is the adhesive and does it have a brand name?

It's this plastic sheet that keeps your carpets dry when it chucks it down by the way.
Teddy Bear

216 GSi Auto Pearlescent Cherry Red 1991

216 Sli SRS Charcoal Met 1996

216 GTi Flame Red 1992

414Si British Racing Green 1995

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1234dist
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Re: Door Plastic Membrane

#2 Post by 1234dist » Tue May 23, 2017 4:56 pm

Any kind of sticky sealant is enough
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Re: Door Plastic Membrane

#3 Post by 220 GSi turbo » Tue May 23, 2017 5:00 pm

Mr Teddy Bear wrote:After you have removed the door card, then this plastic membrane is revealed it seals around the door edge using some sort of high build filler/adhesive. It can be peeled off to gain access to the glass/regulator etc and then reused.

It's this plastic sheet that keeps your carpets dry when it chucks it down by the way.
Yes, that yellow adhesive stuff. (or grey on some cars I have worked on).

Very prone to losing its adhesion at the bottom of the back doors on Rover 25s, causing the door card to collect water in the bottom that then spills over into the rear footwell :mad

I don't know what it is called, but last time I needed to repair one, I used some mastic/putty stuff to stick the membrane back on.
1995 220GSi Turbo: owned for 17 years
1994 216SLi
2000 25 GTi

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Previously: 216 Coupe L887PTR(1993-95) 214SLi N219EPO(1995-96) 420GSi Turbo L955UKV(1997-2004) 214SEi M884BMR(2004-11) 420GSi Tourer M650XEX(2005-6) 214 SEi M103BCW(2011-12)

Mike Templar
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Re: Door Plastic Membrane

#4 Post by Mike Templar » Wed May 24, 2017 3:12 am

It's called Butyl tape. In the old days we used to get a roll of it in every sunroof box.

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Johnny 216GSi
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Re: Door Plastic Membrane

#5 Post by Johnny 216GSi » Wed May 24, 2017 7:13 pm

Mr Teddy Bear wrote:After you have removed the door card, then this plastic membrane is revealed it seals around the door edge using some sort of high build filler/adhesive. It can be peeled off to gain access to the glass/regulator etc and then reused.

Question is what is the adhesive and does it have a brand name?

It's this plastic sheet that keeps your carpets dry when it chucks it down by the way.
Look up "GT Pro" (or GTPro) double sided tape on Ebay - there's a seller selling it. Get some of the 6 or 9mm wide stuff. Exceptionally high tack as long as the surfaces are clean and dry. Sticks to paintwork, bare metal, plastics, the door liner, internal trim, glass and fabrics like there's no tomorrow. Waterproof acrylic adhesive. It really is excellent stuff. It's about £2.50 to £3.00 for a thin reel and a bit more for widths up to 50mm. Get enough as it's good to have some in for all sorts of jobs. You can put up shelves and coat hooks on wooden plaques with the 50mm wide stuff (onto painted plaster for example).

Also sold as "Ultratape" through Rapid Electronics - they tend to sell longer rolls from memory. It's the stuff with the dark green carrier.

It's about 0.8mm thick, neoprene rubber like substance. If you want "high build" just do another run over the top of the first one. I've built up 5mm thick stacks of the 50mm stuff before now so I could try out a chromed number plate plinth on the curved front bumper. You'll tear the tape along its centre before it comes unstuck, so use sparingly. If you do have to remove residue after tearing it off a surface, it will "roll off" using your thumb - but it's harder work than anything I know and you'll probably give yourself blisters if you've a lot to remove. Better than anything I've tried for badges, trim, number plates, etc. Can't recommend this stuff enough.

Scissors will gum up eventually if you're cutting it, so you need a drop of white spirit, acetone, isopropanol, etc. to clean the blades.
Last edited by Johnny 216GSi on Wed May 24, 2017 7:31 pm, edited 2 times in total.
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Mr Teddy Bear
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Re: Door Plastic Membrane

#6 Post by Mr Teddy Bear » Wed May 24, 2017 7:28 pm

Thanks chaps! :D
Teddy Bear

216 GSi Auto Pearlescent Cherry Red 1991

216 Sli SRS Charcoal Met 1996

216 GTi Flame Red 1992

414Si British Racing Green 1995

216GTi TC Ocean Blue 1993

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Re: Door Plastic Membrane

#7 Post by alviseven » Sat May 27, 2017 10:14 am

Just search butyl tape on ebay and the stuff turns up in bucket loads. Pay about £10 for 15m roll but there are bargains.
Over time the stuff goes very brittle and will come off with a wooden wedge - homemade from plywood to similar sizes of a cold chisel - much less damage to paint on door.
Reapply the tape to the door and try to do it in one piece with the join at the top edge where it goes round the door operation wire.
The stuff goes in the groove embossed on the door but you can use it to fix tears where people have broken the plastic film before. Being rather silly about such things I have found that one of my doors was missing this item and so of course to get it back to standard I have replaced with a spare - sad but I have a stock or found one in a yard last year.
I bought two rolls of tape last year cheap as a job lot after previously using one 15m reel and already I am half way through one of the new rolls so do not be worried about buying 15m. its amazing how you use it. Plus the next time you are in the door area it does actually peel off and reapply as it is still pliable rather than the hard stuff after nearly 30 years of time for the original. If you car fussy you can even try to fine the right colour but I have only had white and black and not yet found the fawn - perhaps this is what white goes to after time?
Twin G reg Red 216GSi Rovers

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