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

Getting this solder made me twice(conservatively) the solder guy I was. It melts fast, and is more forgiving than 60/40. Not kidding, I’ll never buy anything else, and for what I do this roll is going to last a while. Thanks for the great product, Denny

Seems the description is in error as it is the 44 core that ships from Amazon.

Id purchase this again it was much better to work with than its unleaded counterparts

Not much to add to the other great reviews other than to recommend you stop reading reviews and just buy it! What an amazing difference from the cheap stuff - not even close! Melts fast, beautiful joints...worth every penny! A+

A nice big spool of thin rosin core solder. How do you review solder? It melts, it flows, it gets solid, it conducts. I spent an afternoon soldering up bits for a quad copter - lots of connectors, a wiring harness for power distribution, etc. This solder worked perfectly well.

I had previously used mainly relatively cheap solders but decided it would be worth it to invest in a better product. This solder flows really well and I had no issues at all soldering anything from through-hole to SSOP10. The roll is huge and even with a decent bit of soldering, it looks like it will last a long time. There is a bit of a sweet smell from the flux (I assume), but I dont find it to be distracting or off-putting, actually, I prefer it to some of the other smells of different solders.

Its a pound of coiled win. Awesome stuff, works so well it makes me seem competent at soldering. Sometimes. .....

What I expected

63/37 is a good low melting point eutectic leaded solder. The flux is strong and makes for very good flow. Its a bit messy because it has a large 3.3% flux core but that means it gets the job done. My favorite solder to use since its so easy. The flux doesnt need to be cleaned according to the datasheet. Kester 44 and Kester 48 are my favorite.

The only solder you ever need or should be using is Kester. Way better than your shack or box store brand.