sealing welds

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I have noticed alot of people welding body panels and frame members and never continuing or finishing the weld Probably due to the thin metal and heat but....how do they keep water and moisture out.

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Reply:Seam sealer..........Mike
Reply:IMHO,, you do not keep the "WATER OUT",,these vehicles are no longer used as daily transportation, so,, you do not drive them in the rain, let alone snow.If the vehicle is gonna live in an inclement weather area, the enclosed areas get paint or some other spray ,, then the access holes are plugged.I have seen YouTube videos of some stuff that comes in gallon cans that is sprayed into those areas,,but,, in Virginia, we do not have to worry about metal rusting away,, like a northern state worries,,,
Reply:u use auto body seam sealer sold at auto paint stores.  3m brand is a reliable brand.  just don't seam seal it shut to trap water.  also seam sealer unless 2 part will shrink.  seam sealer will make bad and ugly welds the same bad and ugly welds.  LOLlincoln 125spmonkey wards 250 ac/dcmiller 211 w/spool gunahp  200 sx tiglotos ltp5000dof course duramax diesel
Reply:Call me a dinosaur, but I would keep moving around until the seam was completed. Not a fan of incomplete work...250 amp Miller DialArc AC/DC StickF-225 amp Forney AC Stick230 amp Sears AC StickLincoln 180C MIGVictor Medalist 350 O/ACut 50 PlasmaLes
Reply:A lot of guys stitch weld sheet metal on body work to prevent warping.....then put gobs of sealer on the seams.