BenB
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| posted on 15/1/09 at 02:32 PM |
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Weld through primer
Has anyone experience of the U-pol weld through primer?
What I'm trying to work out is why they made it zinc based when generally zinc is considered the boogy man, welder's fever etc etc
etc.....
Is weld-through as good as no weld-through??? IE does it have any impact on the welding???
What are the advantages of using it? Just that you can prime something even if you need to weld it later? You'll presumably still need to spray
the top coat once it's all welded up so why not just prime at that point?!?! Confused 
Still bought some though!!!!
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Mr Whippy
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| posted on 15/1/09 at 02:39 PM |
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the black coating on body repair panels is also usually weld through. Its really meant for working outside in the rain and damp and most good garages
don't need this. Unless it takes years and years to build your chassis. I don't like the zinc bit, been very sick before from it
Fame is when your old car is plastered all over the internet
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Mark Allanson
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| posted on 15/1/09 at 07:03 PM |
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quote:
Originally posted by Mr Whippy
the black coating on body repair panels is also usually weld through. Its really meant for working outside in the rain and damp and most good garages
don't need this. Unless it takes years and years to build your chassis. I don't like the zinc bit, been very sick before from it
The black coating on new panels is transit primer
Only bodgit back street garages don't use it
It is essential as it prevents rust forming in the closed area between spot welded panels, it is for this purpose that it has been designed
You only get zinc fever from galvanised panels, and usually only hot dip
Mr whippy, on this occasion 0/10, see me in breaktime
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Canada EH!
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| posted on 15/1/09 at 07:12 PM |
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I painted my rear axle with the primer after removing the stock mounting brackets and before welding on the Locost ones. No problems, no real smell,
and no side effects. Welded one year ago, no rust in the area of the welds either.
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Peteff
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| posted on 16/1/09 at 10:50 AM |
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The black coating on replacement panels is cataphoretic primer for keeping them presentable till they are sold. It isn't weld through but it is
so thin that it burns off as you weld.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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