VikocellNo Clean Solder Flux Pen for Electronics Tabbing Wire Soldering (Pack of 5)

Flux is good quality. None of my pens were low on liquid and none were dry. Good bang for your buck!

They are quite pricey, particularly as compared with alternative flux types but also with alternative flux pens. That said I don't think I'll ever use any other type of flux on SMT soldering ever again. They're brilliant, definitely a flux pen convert.

The flux is on a very fast-drying solvent, so unlike thicker gel type flux, the flux tends to boil away faster than I would like. It does work, however.I have used two pens already (one at home, one at the shop) and they have been fine so far. The fat marker-like tip is fast flowing, and does sometimes need a little bit of wiggling -- but I have not had problems with managing the flow as others have described.I think it's a good value. Definitely better to have than not have.

This gives you precise control over the application of flux. If you get it anywhere you don't want, simply clean with an old brush or cloth and some rubbing alcohol.

The cap goes on and off manually. The Flux comes out as expected.

I've been soldering over 50 years an this pen was my first, an I'll never be with out one again.

I've used this for a while now and can say that it's quality flux given the price.

After applying a thin streak and heating, the solder just assumes a beautiful puddle. Great for work on old solder that continually sticks to your iron, and surface mount components that need to be handled with care.My only complaint is that it is advertised as "no-clean"; but don't get me wrong, there is very little residue and a little rubbing alcohol and a brush makes quick work of it. Works great.