Expired flux keep it bin

[al.dente112]

Evening all, Found 6 tubs of flux but they’ve all expired last year can you still use it or shall I just them away ?

Cheers

 

[Best]

I have left Fluxite, Laco, and Everflux on a pipe for a week (as an experiment) to see how corrosivethey were. No green whatsoever on Fluxite, but still greasy (wet?). The Laco and Everflux had dried, but the pipe was heavily greened. I would not say Laco is non-corrosive, based on this.

The grease based Fluxite won’t be too corrosive, even if left on pipes for years, but I always clean it all off after soldering.
The Everflux is terrible and eats into the pipe. I hate it and never would use it. I regard it as pure acid and that probably explains why it is supposed to work on uncleaned fittings. I heard it can attack the solder and I have come across lots of fittings that have dry looking solder and some leaking.