 Consensus on Lap Joint Weld Prep? |
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Wednesday, 20 August 2025 |
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| bkrantz |
 Dec 17 2019, 09:45 PM
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914 Guru  Group: Members Posts: 8,486 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains 
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So based on experience and expert knowledge, what's the best way to prep metal for lap joints, especially with plug welds? No paint or treatment? Ospho? Weld-through primer? And what about seam sealant after welding before paint?
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Posts in this topic
bkrantz Consensus on Lap Joint Weld Prep? Dec 17 2019, 09:45 PM
cary Metal : ?
Old on old ?
New on Old ?
New on new ?
... Dec 17 2019, 11:22 PM Literati914 Scuff to clean metal, then phosphoric acid, let dr... Dec 17 2019, 11:42 PM
bbrock
Scuff to clean metal, then phosphoric acid, let d... Dec 18 2019, 09:00 AM
FL 000
This was my process too. Only thing I'll ad... Dec 18 2019, 01:43 PM BeatNavy
(I've paid good money for Weld Thru primer th... Dec 18 2019, 04:06 PM Costa05 Definitely no expert here but I lap welded my fron... Dec 17 2019, 11:54 PM Tdskip UPol high zinc does not burn back much it at all i... Dec 18 2019, 11:18 AM cary I use the same U-Pol weld thru primer.
But it only... Dec 18 2019, 02:09 PM FourBlades Weld through primer is a misnomer in my opinion. M... Dec 18 2019, 02:49 PM Superhawk996 Just a generalized statement.
Avoid lap welds i... Dec 18 2019, 03:58 PM bretth Weld through primers I have used always contaminat... Dec 18 2019, 04:18 PM doug_b_928 I've been following a similar procedure to mos... Dec 18 2019, 04:21 PM rjames FCA Explains Ban on Weld-Through Primer Dec 18 2019, 08:27 PM doug_b_928 Here's a link to a discussion I had a couple o... Dec 18 2019, 09:38 PM bkrantz Thanks, everyone. Dec 18 2019, 11:06 PM mb911 The ban link is a good one.. Remember steel melts ... Dec 19 2019, 05:52 AM  |
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