Kester 24-6337-0027 Solder Roll, Core Size 66, 63/37 Alloy, 0.031 Diameter

The short version: Solder quality matters and you are going to have no problems soldering with this. You dont know what youre going to get quality wise with an off brand and its this solder is about the same price per lb as off brands in a smaller quantity. Why roll the dice? Youre not saving any money. It may be more solder than you need but think of it as a lifetime supply of it, then. The long version: I used to buy cheap solder. Its actually not really cheap. Im not going to pick on all things Chinese but I think its fair to say some cheap solder works well and some doesnt. Lets say you can find some solder for $5 shipped - 100 grams of solder. That works out to right at the same price as this. (100 grams is about 3.5 oz. 16 oz / 3.5 oz = 4.5 rolls of solder. ) What happens when you run out? Can you find the same stuff again? Maybe, maybe not. Kester has been making solder for longer than Ive been alive and Im almost 50. Youll always be able to find it and the important part is its going to work. The real problem is with lesser quality solder is that youre just going to have a hard time soldering with it. I was trying to solder two copper clad aluminum wires together with poor solder. I had to heat the wires for a very long time and the solder was globbing up and not flowing and I was starting to think it was impossible to solder CCA wire. I tried at least 10 times with poor results and melted the insulation repeatedly because it was taking me so long to try to get a joint. I googled it and found people proclaiming how difficult it can be to solder CCA. With my cheap solder I could do the same gauge copper easily but I found the CCA impossible. The first try with this solder I got a beautiful joint in about five or six seconds and a second or two to touch it up. Im never buying discount solder again.

Working in electronics this solder is the best in diameter and use.

This is really good for small soldering connections.

Good price. Reputable brand.

It doesnt get any better than this. A 60/40 mix has better wetting characteristics, but a eutectic mixture (63/37) is ideal for consistently perfect electronic joints that set bright and shiny if the wire connections are first heated properly (I set my temperature-controlled iron to 700 degrees F). The type 44 rosin flux residue requires a solvent to clean it away (e.g., isopropyl alcohol), but this flux type very effectively cleans metal joints during soldering. Unfortunately, this solder may be impossible to get in the future since the ROHS initiative bans lead. The replacement silver-bearing solders require higher melt temperatures, but Kester will certainly make the best of these solder types, too.

Way better than the old 60/40 stuff. This solder is great for through-hole use. Great diameter which is small enough to be precise on some of the finer soldering jobs out there, such as soldering headers to a Nano. It flows and bonds great. Other than possibly trying a lead-free solder, this will be my go-to solder for years to come.

Works well

Kester is top quality and at a Great Price.

This is the only brand of solder that I use.

Great quality