Kester186 Liquid Soldering Flux, RMA Rosin, 2-ounce Bottle

This is the best flux I've ever gotten my hands on. Burns quick, less residue to clean off than other brands- when in doubt go Kester!

In active retirement I repair and restore great old ham radio equipment and antique old radios. The old solder is often so oxidized it won't flow and stick well when parts are replaced. In addition to using new rosin solder, a bit of this flux on the joint to be re-worked makes all the old solder receptive to accepting the new solder, to adhering to braided solder (wick) remover, and to make a good, strong, well-flowed joint. It works great for me! It's supposed to be non-corrosive, but just in case, removing any excess is a great idea!

Great product

This is some of the best flux you can use for electronics soldering. The bottle is a little hard to open and it's a little pricey, but it does a fine job and makes soldering easier, and gives you quality solder joints. Other flux products I've used do not work nearly as well.

Rosin pulls solder in, remains clean, does not have any pungent odor, and stores easily. The provided long term storage cap can get gummed up a bit because obviously resin is a bit sticky/tacky when left out in open air, so I just keep mine in a plastic baggie and it works great. The provided needle tip dispenses the rosin with precision, and will tend to get stuck if left in for longer than a day. It can still be unscrewed by hand easily. This is a tremendous amount of rosin, possibly a lifetime supply if you don't solder very often. I would recommend it for someone who solders daily.

My order shipped early and worked well

I’ve been using Kester products for many years, and while they are a little bit more expensive they have never let me down. I do a lot of cabling repair on micro gauge wire, and this viscosity combined with their genius little applicator tip makes my life so much easier. Also perfect for reflow work! I highly recommend and always will.

This is a handy 2 ounce size with a dispenser. I could write pages of material in this review but I will spare you the long story. The product is works as needed and cleans up pretty easily off the joints. If you are looking for a flux to impress your neighbors and friends, this is your product!