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Old 06-22-2008, 04:51 PM
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Gluing foam and fabric to Sintra board?

When gluing foam and fabric to sintra board do you have to rough up the surface of the sintra panel for adhesion?. It's real smooth material and seems like it would need to be scuffed. Thanks

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Old 06-22-2008, 05:40 PM
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It would be more important to scuff up the closed cell foam (if that's what you're using) than to scuff the Sintra.
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Old 06-22-2008, 08:35 PM
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Thanks Dan! I know the foam needs scuffing but will the tweed adhere to sintra if it's left smooth?
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Old 06-22-2008, 09:37 PM
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Depends on the panel for me. If it's a panel that hangs upside down, like a headliner or trunk lid, I sand everything (except of course the back of the material).

If it's kick panel or other small panel, I wouldn't bother.

Your best bet, consider you are probably using a different brand of foam and a different brand of adhesive, would be to do a test for yourself. Take 2 scraps of the plastic and sand one, but don't sand the other. Glue a piece of material to both of them. Let it sit a couple days, and peel the material off of both pieces of plastic. If they both come off with equal force, you know it's a waste of time to sand the plastic!
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Old 06-23-2008, 03:18 AM
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Quote:
Originally Posted by jimchevy
Thanks Dan! I know the foam needs scuffing but will the tweed adhere to sintra if it's left smooth?
Are you gluing the tweed to the Sintra without foam between the two, or are you talking about on the back side of the panel?
In any respect, it certainly won't hurt to scuff the Sintra, one way or another. What are you using for glue?
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Old 06-23-2008, 05:24 AM
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kristkustoms- Right now I'm just experimenting like you suggested with tests. Dan, I'm using 3m spray 90 and plan to spray the tweed to some parts of foam and some parts directly to sintra. I think for now I'll glue some scraps of foam and scraps of tweed to some scraps of sintra that has been sanded and unsanded and do the removal tests in a few days as kristkustoms suggested and see what happens. I'm in the test mode Thanks to both of you for your help!
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Old 06-23-2008, 07:23 AM
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Just make sure the glue is rated for high temperatures. 3M 08090 (black can) is high temp top and trim adhesive, but 3M 90 (green can) is not high temp, only "high strength". Whatever you do, don't use 3M 74 or 3M 77, they just don't work. This is especially important on the horizontal or overhead applications Shawn was talking about.
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Old 06-23-2008, 10:56 AM
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I was planning to use the 90 green label. The spec sheets say they are both rated to 180 but If you think the 08090 is the way to go, I'll buy that. I've seen your past posts recommending Performance brand spray adhesive. Is this better than 3m 08090?.
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Old 06-23-2008, 12:33 PM
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Either one would be fine. If you choose a 3M product, 08090 (also called super trim adhesive) is rated to 180 degrees also, but it is designed for trim work, so I would lean towards that.
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