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Bondo repairs on Alum. railing can't take 400 deg.




2005

I WORK FOR A RAILING COMPANY AND SOMETIMES WE HAVE TO FIX ALUM. RAILS. AFTER WERE DONE SANDING AND GRINDING, WE APPLY Bondo [affil links] AND THEN WE REPOWDER COAT THE RAIL. THE BONDO THAT WE ARE CURRENTLY USING CAN NOT BE USED IN AN OVEN AT 400 DEGREES.. WHAT DO YOU SUGGEST?

THANKS,

Jennifer Stimphil
ARCHITECTURAL COLUMNS AND RAILING SYSTEMS - WINDSOR MILL, MARYLAND



I'm not a professional but I happened to stumble upon your question and it reminded me of a subject on a web site I had been looking at the other day. This other site was discussing what is called "molding", filling in gaps and smoothing out welds on motorcycle frames before powder coating. They had the same problems with Bondo and the heat required to powder coat. They said their best solution to this problem was a product called "Lab-metal [on eBay or Amazon] " that they applied in thin coats and sanded. It is supposed to withstand the heat of powder coating without any problems.

Francis Fields Jr.
- MD, united states
2005



2005

I have been faced with this problem many times in the past in my coating job shop and as a previous person mentioned, Lab-metal [on eBay or Amazon] does work well for small defects. I find it a bit tedious. Another option that you may consider is J-B Weld [affil links].
You will need to preheat the item for recoating as it is not electrically conductive. There are other high temp epoxies that may function as well but again preheating is necessary.

David L. Wix
- Colwyn, PA, U.S.A.




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