Interior Discussion about interior restoration, repairs, and modifications.

Waterproofing T-Top Headliner Bottom?

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Old Sep 28, 2009 | 09:30 PM
  #1  
majobis's Avatar
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From: Massachusetts
Car: 1987 IROC Z w/T-Tops
Engine: 305 TPI
Transmission: Automatic
Axle/Gears: G92
Waterproofing T-Top Headliner Bottom?

I was wondering if anyone has ever done, or heard of, applying some sort of protective layer over the t-top material? Not the colored fabric that is seen, but rather, the yellow underside.

I'm finishing up a 100% interior restoration and would like to do preventative maintenance in case of future t-top leaks.
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Old Sep 29, 2009 | 07:49 AM
  #2  
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: Waterproofing T-Top Headliner Bottom?

a lot of people when restoring the fiberboard headliners use fiberglass to make it a bit stronger. This would also be a decent choice for waterproofing if your headliner is in good shape. However, if you still have the cloth on it (the part that shows), you may end up getting resin soaking through and ruining the appearance.

may be able to try beadliner as well, but kinda think that may soak through as well.
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Old Oct 7, 2009 | 08:22 AM
  #3  
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Car: 1983 Pontiac Trans Am Daytona 500
Engine: Crossfire 305ci V8
Transmission: Jasper 700R4 4 speed Automatic
Axle/Gears: 3.23 limited slip/posi
Re: Waterproofing T-Top Headliner Bottom?

any updates?
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Old Oct 9, 2009 | 08:29 PM
  #4  
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From: Canada
Car: 86 IROC
Engine: 350
Transmission: 5 speed
Axle/Gears: limited slip
Re: Waterproofing T-Top Headliner Bottom?

I replaced my extremely worn out, sun rotted head liner with an abs one. Looks factory and no more worry about water ruining it.
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Old Oct 9, 2009 | 08:50 PM
  #5  
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From: Boston, MA
Car: 1983 Pontiac Trans Am Daytona 500
Engine: Crossfire 305ci V8
Transmission: Jasper 700R4 4 speed Automatic
Axle/Gears: 3.23 limited slip/posi
Re: Waterproofing T-Top Headliner Bottom?

Originally Posted by 5speed
I replaced my extremely worn out, sun rotted head liner with an abs one. Looks factory and no more worry about water ruining it.
do you have any pictures of it and the install? how did it fit?
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Old Oct 19, 2009 | 07:57 PM
  #6  
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From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: Waterproofing T-Top Headliner Bottom?

I just did my ttop headliner this week. When I removed it, it ended up in three pieces! I have the overhead console so there is not much material to work with because of the cutouts. I was able to piece it back together with 5 min epoxy and then laid glass and resin across all of the weak spots. When I finished that, I decided to put resin on the entire surface of the inside (where the water would land on it). Also stiffened up the whole thing a bit. I didn't bother coating the underside though.

Overall it turned out nice. Still need to install it but I want to check the hatch bolts while it's still out as I think one of them might be leaking.
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Old Oct 19, 2009 | 08:04 PM
  #7  
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From: Boston, MA
Car: 1983 Pontiac Trans Am Daytona 500
Engine: Crossfire 305ci V8
Transmission: Jasper 700R4 4 speed Automatic
Axle/Gears: 3.23 limited slip/posi
Re: Waterproofing T-Top Headliner Bottom?

Originally Posted by ZZ3Astro
I just did my ttop headliner this week. When I removed it, it ended up in three pieces! I have the overhead console so there is not much material to work with because of the cutouts. I was able to piece it back together with 5 min epoxy and then laid glass and resin across all of the weak spots. When I finished that, I decided to put resin on the entire surface of the inside (where the water would land on it). Also stiffened up the whole thing a bit. I didn't bother coating the underside though.

Overall it turned out nice. Still need to install it but I want to check the hatch bolts while it's still out as I think one of them might be leaking.
do you have any pitcures?
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Old Oct 19, 2009 | 10:18 PM
  #8  
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From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: Waterproofing T-Top Headliner Bottom?

Yeah I took a bunch while I was doing the resin work. I didn't take any during the headliner material installation (another story in itself). I'll upload them tonight and put a link up for you.

Steve
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Old Oct 20, 2009 | 12:42 AM
  #9  
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From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: Waterproofing T-Top Headliner Bottom?

Wow what a pain! I haven't edited anything on my site for about four years. Finally decided to start using it again. Forgot how long it takes to make a page with some photos and info. Anyway here is my page on the headliner work:

http://www.mentalsocket.com/Iroc87/headliner.html
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Old Oct 20, 2009 | 06:44 AM
  #10  
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From: Boston, MA
Car: 1983 Pontiac Trans Am Daytona 500
Engine: Crossfire 305ci V8
Transmission: Jasper 700R4 4 speed Automatic
Axle/Gears: 3.23 limited slip/posi
Re: Waterproofing T-Top Headliner Bottom?

Originally Posted by ZZ3Astro
Wow what a pain! I haven't edited anything on my site for about four years. Finally decided to start using it again. Forgot how long it takes to make a page with some photos and info. Anyway here is my page on the headliner work:

http://www.mentalsocket.com/Iroc87/headliner.html
awesome craftsmanship dude
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