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disco sills or any sills

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henryandlesley:
Hi now i have done the sills on my disco i was thinking about filling them with expanding foam so it stops the water from getting back in and rotting them out away has anyone done it before

Disco Matt:
It's a neat idea, I'd just be worried about whether the foam had filled every inch of the sills and whether it was trapping water inside them. There's also the problem that if you needed to weld them again then you'd have to remove a load of foam to avoid setting fire to the truck!  :lol:

If it was possible I'd suggest constructing the sills as airtight boxes and filling them with nitrogen, which is inert and would not allow rust to take hold. It might however make you a bit more likely to float away in deep puddles...

Disco-Ron:
Mids 70's classic mini;'s had their sills filled with foam....... i wouldn't bother if i were you, it's crap... i suggest that it would just get wet, and stay wet forever, makiing the situation even worse.....

Range Rover Blues:
Agreed, it makes it worse.  Waxoil or zinc rich paint ;)

lee celtic:
I'm About to do the box section thing with mine I was thinking of the foam thing but then thought I would seal the ends of the box section with steel plates but with a nut welded on one end so I can stick a load of wax oil in then put a bolt to close the hole afterwards then as I drive around it will recoat the insides  :lol: :lol:

I can then top it up when needed  :dance:

Might do something similar on the rear cross member  :-k

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