Kester 24-6337-8800 50 Activated Rosin Cored Wire Solder Roll, 245 No-Clean, 63/37 Alloy, 0.031 Diameter

Works great for clean copper only. If you have slightly dirty surface you must use a stronger rosin then what is this. I love the option. If this doesnt stick I add a little Flux and clean after I solder. If it a clean surface I just use this and dont clean. Works great this way for.me.

Dont get the cheap stuff. This spool is very high quality and easier to use than the cheaper solders and the joints also come out shinier.

Limited use so far, but did exactly what I needed.

With regular 60/40 solder, the solder undergoes a plastic period where its not entirely a liquid and not entirely a hard solid. If you bump or wiggle the joint in this plastic period, it ruins the joint. Save yourself the hassle by just getting this formulation which more or less eliminates the issue. Bump to your hearts content.

Perfect for light use, hobbyists, etc.

Just the right size and melt temperature.

Good product

Ive tried other brands, Kester is the best. For almost 30 years Ive used this brand and cannot say enough good things about this solder.

Ive had a small spool of this stuff that I found in the trash at work. solders nice, but I ran out. This will be a lifetime supply for me.

Great solder. Got some perfect shiny joints.