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| | | | Joined: Jun 2011 Posts: 1,901 Shop Shark | | Shop Shark Joined: Jun 2011 Posts: 1,901 | Tim I don't "know' for squat... I'm just opinionated!
Assuming clean metal is what I'm starting with
3 coats epoxy primer underneath and 2 or 3 inside for sealing the metal. then I'd go for the 3M 8656 on the page you linked.
It say's its designed for the seams I believe OP is talking about.
If it is between pieces being bolted/screwed together maybe the 8578.
I made some gaskets for the headlight bucket/grill/fender seam out of a left over chunk of window setting tape the other day. I was pleased with how it worked into the seam with a plastic edger, trimmed off nice. I imagine the 8578 is like that. Great for sandwiching not for filling a gap.
I think the All Around 8500 would be good if your sealing the joints up for paint. Just as long as there's NO SILICONE...
JMO
Give me ambiguity
or give me something else
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