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Old 01-14-2017, 06:26 PM   #1
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Good adhesive for shuttle interiors? Epoxy?

I need to make attachment points for plywood bulkheads etc, what adhesive would you recommend to attach to the fiberglass interior of a shuttle bus?
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Old 01-14-2017, 11:15 PM   #2
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Liquid nails has several different formulations for different materials. I used Liquid Nails for marble and granite to glue my poly-iso insulation sheets to the fiberglass. Regular Liquid Nails should work fine for plywood.

The interior fiberglass walls in my Eldorado Aerotech hold a sheet metal screw real well. If I didn't drill my pilot holes big enough I could twist off the head of the screw.
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Old 01-16-2017, 09:11 PM   #3
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I've found that Loctite PL Premium works well to attach insulation to the walls and Fast Grab PL Premium for ceiling insulation. As roach said screws are great for things that can be screwed.
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Old 01-30-2017, 06:15 PM   #4
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I am removing the thin plywood on the ceiling and then will be insulating, there will be no way to put in screws without making a hole in the roof. I really have doubts that construction adhesive can glue 2x4 or .5" plywood to the fiberglass overhead, but if it will glue two by lumber, then I can attach plywood to that, likely will use .25" ply over reflectix and rigid foam insulation.

I am also building a barn door for the interior and need to install a header, the problem with epoxy is that it doesn't flex very brittle. I see I should experiment, but hoping someone has faced the same problem successfully.
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Old 01-30-2017, 11:46 PM   #5
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I like the PL too.
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Old 01-31-2017, 01:14 AM   #6
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I like the PL too.
I will try it and see if it works, should be removing the ceiling and insulating within a day
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Old 01-31-2017, 08:24 AM   #7
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I will try it and see if it works, should be removing the ceiling and insulating within a day
Are sure you need to do that? My shuttle has foam insulation unlike skoolie bus' that have bat insulation.
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Old 01-31-2017, 09:27 AM   #8
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I'm hearing that you need to bond in stringers to accept fasteners for your inside skin. If so, here's what I'd do:

Epoxy resin thickened with colloidal silica or flocked cotton fibers. This after cleaning the fiberglass w degreaser, scuffing w a red Scotchbrite sanding pad, and wiping down w acetone. Be aware that this permanent, so I would bond in high quality wood and not just that soft crap from Home Depot.

West System has all the info you need:
WEST SYSTEM | Use Guides
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Old 01-31-2017, 11:40 AM   #9
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What brand bus body do you have? Unless you have one of the molded bus bodies there must be some sort of structural members holding up the fiberglass walls/ceiling.
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Old 01-31-2017, 05:33 PM   #10
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What brand bus body do you have? Unless you have one of the molded bus bodies there must be some sort of structural members holding up the fiberglass walls/ceiling.
It is called a Startrans, common mfg around here.
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