Review on 🔩 Ultimate Lead Solder Wire: Kester24 6337 6403 331 – Premium Quality and High Efficiency by Jason Cavett

I don't know how long organic flux-cored wire has been around, but compared to the old flux-cored wire, the only comparison is that both have soldered. Gone was the smoky, acrid smoke of flux-cored solder and the messy residue that was left behind. The organic flux in the new solder can be easily washed off with water. This product works really well, thanks Kester!