Looking at the Amazon page, it looks to me like it's meant for plumbing. That "fact" doesn't mean you can't use it for electronics. Or that you can. Only that the intent of the manufacturer is for "heavy" soldering.
Note that the stuff is a mix of flux and solder, thus the word "tinning".
I wouldn't use it. I use solder specifically designed for electronics. And the same for flux. Which I DO use.
For solder I use: Kester rosin core 44 in the .5mm size
For flux I use a liquid rosin flux
I have been paid by a military contractor to do this work.
Ed
