Advice for undertray panels?

[slimreynolds]

I am looking to put up some panels under the car but I'm not quite sure what to use for materials. I'm thinking polycarbonate plastic or something light and strong. I also need a good way to fasten it to the car. I need something that I can remove when I change the oil and perform other kind of maintainence. Any suggestions?

[Bill in Houston]

Materials:
Coroplast
plastic paneling board stuff from Lowes/Home depot

Fasteners:
screws
nylon push rivets from Lowes
other types of trim fasteners

Do a search on coroplast and on skirts you can see what others have done.

Polycarbonate might work well but it seems a little stiff and a lot expensive. :-) It would be nice though...

[brucepick]

I'm thinking plywood for my car, if/when I ever get under there to do it.

They make 5.5 mm. and something like 2.7 mm. Lauan plywood.
1/4 inch is just over 6 mm., so you get the idea - this stuff is thin and lightweight. About $15 and $7 per sheet, respectively.

I'm going on the theory that there's enough airflow to keep it dry. My plywood + plastic air dam was on for about 7 weeks and I saw no evidence of delamination. Ymmv of course.

[caprice]

Where can you buy coroplast

[brucepick]

Best deal, after Election Day clean up some signs.
Or contact your local political parties, maybe some candidates have old signs that need removal from basements.

Signmaking shops.
I paid $30 for 4x8 feet. They cut that from something much bigger!

Also some art framing shops.
Or shop on line but you'll be shipping something pretty big.
Just google "coroplast".

[usedgeo]

Originally Posted by caprice

Where can you buy coroplast

I found the best price at an industrial plastic supply I found in my yellow pages. Local sign shops are very expensive.

[Bill in Houston]

Recycling centers and city right-of-way cleanup crews have also been suggested as sources.

[slimreynolds]

wouldn't you want something stiff? I think the coroplast would be too flimsy. wouldn't it?

[jbum]

what about clear sheets of acrylic? I found some at Orchard Supply Hardware.
I think coroplast is lighter but is it stiff enough?

[Jim Dunlop]

Why not aluminum sheet? It's sort of expensive, but I have some lying around from my grille blocking.