Bigj66 Posted April 8, 2021 Share Posted April 8, 2021 I’m thinking of having a go at repairing my tub using Ali welding rods but when filling in small holes I’ll need something on the back to stop the molten Ali from dropping through until it cools. I know from discussing mig welding that you can use a piece of copper to do the same job but will copper also work with Ali and not stick to it or do I need to look for some other metal? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 8, 2021 Share Posted April 8, 2021 Can use just a piece of hardboard. 1 Quote Link to comment Share on other sites More sharing options...
Stellaghost Posted April 8, 2021 Share Posted April 8, 2021 Copper or brass will work fine regards Stephen 2 1 Quote Link to comment Share on other sites More sharing options...
L19MUD Posted April 9, 2021 Share Posted April 9, 2021 I used this technique to do exactly the same and it worked well. I had never welded ali before. I changed to a teflon liner in the MIG and changed the gas and did it that way. Didnt produce anything pretty but was successful and you are only going to grind back off flat anyway Quote Link to comment Share on other sites More sharing options...
HoSS Posted April 14, 2021 Share Posted April 14, 2021 I've used this stuff to do repairs & modificationes e.g alternator bracket, it works well, but the part must be totally oil free and watch out as the rod melt point is not far below the alu melting point. Aluminium Repair Brazing Rods Online - Welding and Brazing - HTS-2000 Aluminum Repair Quote Link to comment Share on other sites More sharing options...
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