Body filler, Do NOT use plastic |
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Body filler, Do NOT use plastic |
tdgray |
Oct 2 2003, 08:39 AM
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#1
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Thank God Nemo is not here to see this Group: Members Posts: 9,705 Joined: 5-August 03 From: Akron, OH Member No.: 984 Region Association: None |
Here is prime example of 1) how not to fix a rust spot. 2) NEVER NEVER NEVER use plastic body fillers. I'm sure at one time this was a small hole or rust spot that was fixed with plastic filler (Bondo and the like). Plastic fillers attract water and hold it thereby rusting any and all unprotected metal underneath. Not to mention that this was a very poor repair job in the first place.
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GWN7 |
Oct 4 2003, 12:22 AM
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#2
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King of Road Trips Group: Members Posts: 6,280 Joined: 31-December 02 From: Winnipeg, MB, Canada Member No.: 56 Region Association: Northstar Region |
The clue to that is "expanded foam"....it's open cell foam. Which means that the cells are open and will absorb moisture over time. Closed cell foam is used in construction (the blue stuff) and costs 2X as much as open cell. It's used where it will come in contact with water. Below grade or sideing.
The open cell stuff works like a sponge, absording moisture out of the air and realising it against the metal. I had to replace the floor in my boat last yr. The manufacture used open cell spray in foam for floatation. It had absorbed water over the yrs and weighed about 300 lbs, not to mention causing the floor to rot from the underside. I tore it all out and replaced it with cut sheets of the blue SM stuff. New decking and carpet, good for another 10 yrs. |
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