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Thanks for confirming. From my in-depth research of following framebuilders on Instagram I can't remember any not using lots of flux. Good point on different types of fluxes reacting, hadn't considered that.
That's very kind thank you. I'm based in Bedfordshire but don't mind investing in consumables. Any flux/brass rods you can recommend I'm all ears to repair/further ruin a damaged 531c frame.
jambon
PhilDAS
I don't think any framebuilders use flux coated rods. You need to really cover the whole joint in flux and at that point, any extra on the rod is pointless.
I think the reason most don't use them is because as I say, you have to flux the joint and I think you can have a lot of trouble with the two fluxes being different and incompatible and some chemical nastiness happening.
If the flux doesn't react badly, I'm sure it would work though. I think you'd want more precise control over your rod by using bare rods but for a quick and dirty job, it would work I'm sure.
Where are you based? I've got a bunch of brazing rods and maybe a pot of flux that you could borrow