Just filled the space between the outer GRP and the inner ali (down
each side of the car) with expanding foam.
Any views on this?
I thought it was a good idea!
Pat...
"Moles are always smaller than you imagine"

I thought about using that too, in between the side panels and the cockpit ones to stop the ali vibrating. Dunno if it would make any difference but if it stick's to the panels then it might make them a tad more rigid and less prone to denting.

though I could be talking shit

chris

My panels are now very solid and do not resinate - quite pleased with the result.
Will also save me when a HGV hits the side of my car!

Recently watched a boat-building programme on Home and Leisure (Sky channel). The bloke was stripping down an old dinghy and cursing greatly, due to the 2-pack expanding foam everywhere.

The main problem was that it held the water like a sponge, leading to the wood rotting. I'd guess that if it held water that well, it would contribute to long-term corrosion of the chassis and body panels (remember that to get electrolytic corrosion you need water - no liquid, no corrosion).

ever cautious,

David

I seem to remember that expanding foam can soak up water, this would be bad like David says.

THink i'll give it a miss, good old mastik (non vinega based) is good for stopping vibration and sticking panels against the chassis.

didn't think about the water issue, DOH!

The external grade expanding foam is supposed to be non absorbent.
As long as the area is fairly watertight it should not be a problem anyway.

Cardboard is very absorbant, but it doesn't stop the manufacturers using it for door cards!

Also for electrolitic corrosion you need two dissimilar metals in contact with each other. A wet sponge inbetween two metals would not promote any more corrosion than would otherwise be possible, even if metal was bare.

Terry

Thanks.
Was getting worried for a mo. Seen as it is the stuff for sealing in windows and filling cavaties, it must be water resistant to an extent!
Pat...