Weldable primer

Crisco · 11-30-2010, 11:40 PM

Bob, what you are looking for is a weld thru primer. SEMS brand is good. You can get it at any automotive paint store. Clean the weld areas to remove oils etc. Spray the primer in these areas and let it completely dry before you start welding.

http://www.google.com/products/catal...d=0CCIQ8wIwAA#

Dion Hildebrandt · 12-01-2010, 02:05 AM

There are many brands of weld thru primer, we use 'UPOL' copper rich ourselves. The weld thru primer is meant mostly for welding sheetmetal together, the primer melts and surrounds the weld or 'hot spot' to conceal the spot from potential rust issues. for welding the LCA areas clean the area thoroughly as it is not an ideal location as it will most likely be overhead and cramped quarters ,and undercoat or paint afterwards. The weld thru primer may cause a problem for striking an arc and will promote spattering of the weld. An alternative is to use POR15 afterward, that s**t is incredibly tough and will glue the lid to the can if your sloppy with it haha, hope this helps

K Stubbs · 12-04-2010, 10:07 PM

Actually you shouldnt even need a weldable primer in that location, just clean it good and weld it. Primer it after. You will get a much better weld, and if its a racecar you shouldnt have rust issues there anyway if painted properly. I do alot of racecar fabrication, mostly tig, but never use a weldable primer.

Mark Yacavone · 12-04-2010, 10:29 PM

I 've used that stuff on floorboard patches,etc at the overlap ,where it does work well.
It'll kinda melt away from the tack weld ,but still have a coating in place when you're done.
I agree with others...You really don't need it for chassis work.

Charlie Yannetti · 12-06-2010, 09:08 PM

I had a travelling body shop snake oil salesman sell me a can once.. I said ONCE.. tried it, put it on the shelf marked "EXPERIENCE", and never looked at it again.. follow the advice on this forum.. clean it good, weld it once, paint it right, never do it again..

rallye bob · 12-07-2010, 06:11 AM

Quote:

Originally Posted by Charlie Yannetti

follow the advice on this forum.. clean it good, weld it once, paint it right, never do it again..

Done.......... ;-)
Thanks, to all, for the great advice

11-30-2010, 11:40 PM	#1
Crisco Member Join Date: Jul 2005 Location: Hendersonville, TN 37075 Posts: 226 Likes: 4 Liked 47 Times in 21 Posts	Re: Weldable primer Bob, what you are looking for is a weld thru primer. SEMS brand is good. You can get it at any automotive paint store. Clean the weld areas to remove oils etc. Spray the primer in these areas and let it completely dry before you start welding. http://www.google.com/products/catal...d=0CCIQ8wIwAA#

12-01-2010, 02:05 AM	#2
Dion Hildebrandt Member Join Date: Nov 2008 Location: calgary alberta canada Posts: 383 Likes: 0 Liked 1 Time in 1 Post	Re: Weldable primer There are many brands of weld thru primer, we use 'UPOL' copper rich ourselves. The weld thru primer is meant mostly for welding sheetmetal together, the primer melts and surrounds the weld or 'hot spot' to conceal the spot from potential rust issues. for welding the LCA areas clean the area thoroughly as it is not an ideal location as it will most likely be overhead and cramped quarters ,and undercoat or paint afterwards. The weld thru primer may cause a problem for striking an arc and will promote spattering of the weld. An alternative is to use POR15 afterward, that s**t is incredibly tough and will glue the lid to the can if your sloppy with it haha, hope this helps __________________ Dion Hildebrandt 6009 STK H/SA

12-04-2010, 10:07 PM	#3
K Stubbs Member Join Date: Aug 2008 Location: Benton, Arkansas Posts: 402 Likes: 0 Liked 20 Times in 3 Posts	Re: Weldable primer Actually you shouldnt even need a weldable primer in that location, just clean it good and weld it. Primer it after. You will get a much better weld, and if its a racecar you shouldnt have rust issues there anyway if painted properly. I do alot of racecar fabrication, mostly tig, but never use a weldable primer.

12-04-2010, 10:29 PM	#4
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,840 Likes: 2,934 Liked 5,152 Times in 1,966 Posts	Re: Weldable primer I 've used that stuff on floorboard patches,etc at the overlap ,where it does work well. It'll kinda melt away from the tack weld ,but still have a coating in place when you're done. I agree with others...You really don't need it for chassis work. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

12-06-2010, 09:08 PM	#5
Charlie Yannetti Senior Member Join Date: Jan 2005 Location: Alpine, NJ Posts: 568 Likes: 188 Liked 192 Times in 83 Posts	Re: Weldable primer I had a travelling body shop snake oil salesman sell me a can once.. I said ONCE.. tried it, put it on the shelf marked "EXPERIENCE", and never looked at it again.. follow the advice on this forum.. clean it good, weld it once, paint it right, never do it again..

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