I'm trying to solder a leak in a tube in a copper radiator.
I can't seem to get it clean enough to make the solder stick.
The cleaning/acid paste i have/use does not do the trick.
What kind of flux/cleaning agent would be the best to use on these things?.
I used to have a liquid flux called "S39" that worked fine but i'm out and it is no longer available.
PS: don't tell me to just go to a rad shop cause i can think of that myself :wink:
I can't seem to get it clean enough to make the solder stick.
The cleaning/acid paste i have/use does not do the trick.
What kind of flux/cleaning agent would be the best to use on these things?.
I used to have a liquid flux called "S39" that worked fine but i'm out and it is no longer available.
PS: don't tell me to just go to a rad shop cause i can think of that myself :wink: