RectorSeal Nokorode 14020 Paste Flux, Cleans and Fluxes, Plumbing, 8 oz.

Good stuff very effective

Best flux ever

Basic understanding of soldering. Seems you should have some. Buy it. You must have this if going down that rabbit hole

Took a chance because I’m sick of liquid flux and this paste is so so much better. I don’t think it’s the “standard” paste flux used for stained glass but it absolutely works. There’s no popping, it distributes solder like butter. Cleans easily and with the size of this tub it’s going to last forever. Tested it out on some glass globs and I can’t believe the difference. Solder looks clean and smooth, much less to clean off from the burned liquid flux. 10/10

Used this product before, this stuff really works great we have used it for years in the plumbing business

Low smoke, a little goes a long way and one jar will last many months. Easy to clean off with hot water and soap. Best value for the money. Easy to brush on with provided brush or with your own. Durable and doesn't dry out.

I'm completely new to soldering so when I got a soldering iron for Christmas, I immediately got to work trying to solder some displaced wires in an old pencil sharpener. After many fruitless attempts and all my solder sliding off the metal contacts onto my work surface, I finally did some research and found out that I needed some flux. The included brush made application very easy. I just slathered this stuff all over the contact areas and tried soldering again. This time, my solder actually stuck to the wires and metal contacts. It seems like it did the job cleaning both the wires and metal contacts inside my pencil sharpener. I'm not really sure how else to rate flux but this is the first one I used and it worked, so I'm happy.

EXCELLENT PRODUCT AND SERVICE.

Tried this for the first time today, I have been doing stained glass for a quite a few years, always used a water based flux, but not anymore after using this, you use less the solder flows better, easier to store not frightened about knocking it over and spilling it, like water based, wish I had found it sooner.

For the past 40 yrs I have used 'Water soluble Aqua Flux'. Read about this Paste Flux and gave it a try. I find that I do not have to apply so much and the solder flows much better.