Quote:
Originally Posted by Varn
I have used expanding foam to rebuild rocker panels. After 2 years they still have not fallen off/out.
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I did something similar five years ago, and at the time was convinced it would hold moisture and rot out first. I was wrong, it's now the one spot not taken out by rust.
Five years ago: Opened corner up (
fist sized hole) and filled the cavity w/foam.
S10 4x4 Pick Up Photos by kach22i | Photobucket
Today:
Now the non-foam treated side is a bit more interesting, that side was fine five years ago, so it was never opened up.
Five years ago:
Now/today:
From this documentation, one might argue that the foam holds less moisture than dirt inside of the panels, or moisture locked in because of possibly clogged weep holes.
Therefore foam is superior, but that might not be the whole picture.
In general, my driver's side is twice as rusty as the passenger's side.
I suspect this is because that when parked on the street in front of my house, the driver's side faces the street where the spray of salt in the winter is being kicked up by passing cars during the winter months.
Looks like I might have to foam my whole truck, but if I do that shouldn't it be more aerodynamic this time around?
