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        General >> Give/Need advice to/from others >> Welded joints
        
(Message started by: scorpio197 on Jul 13^th, 2010, 8:00pm)

Title: Welded joints
Post by scorpio197 on Jul 13^th, 2010, 8:00pm

hello folks ,could anyone out there tell me what the the best product is to prime weld joints on a car .The joints will be underneath in places that would not get painted and clear coated .I have got a tin of black shultze to spray on the welded area but have been told the welds need a primer ( etching primer ) to stop the shultze from peeling of .I am unsure what to use ,would a red oxide be good enough or is there a specific product to use . regards david

Title: Re: Welded joints
Post by gozz on Jul 13^th, 2010, 8:13pm

I use Isopon Zinc 182 primer,was Davids now Upol.Have always had good results.
GOZZ.

Title: Re: Welded joints
Post by Tons_of_fun on Jul 15^th, 2010, 8:36am

Hiya David. Red oxide is a pre primer rust inhibitor ( sort of a posh primer ). Most motor factors will stock 'acid etch primer'. It's primary use is to get a good bite onto bare metal before the primer & top coat gose on. It goes something like this... Etch primer, primer ( use red oxide if you wish ), top coat & clear coat to finish. The isopon primer Gozz mentioned is good stuff & i would recomend it to anyone. Almost like galvanising in a can. The surface you are treating has to be spotless before you apply it though, as any surface contaminants will prevent the primer covering properly & moisture will get behind it & rust will thrive. In damp conditions i often use a hair drier to warm up the metal in an attempt to get rid of any moisture that you cannot see. Hope this helps... Craig :-)