Chip Quik CQ4LF Liquid Flux No-Clean (10ml (0.34oz) Pen)

Easy to use Makes resoldering solder flow like water following flux...excellent results..Had to use for an emergency circuit board and 5 chips for a Robotic Surgical Machine and during a 7 hour kidney transplant..Surgery was in progress when it lost use of 2 directions on one of the beams (arms) resoldered using this flux making fast work out of. What could have been a deadly result..Repaired arm..tested. put in new (donated)kidney , Surgeons did thier connecting,,turned on bloodflow..patient was awake and In recovery when i left approx 2 hours after arrival..i asked for Fentynal for my nerves..lol..Recieved great praise from family of patient, Surgeons, and the Co that makes these Surgical Robots..this ones name was Kloe Kidney...I now carry 3 with my soldering torch and iron...buy some..it could save a life...Tom F...field service engineer Pyxis Corp...California..Hospital was In New Haven Ct...Yale:) " I FIXIS THE PYXIS" :)

This flux pen does seem to work well, although it does take a bit to get used to how it works. You have to push the tip into the pen and allow it to spring back a few times before the solder will start to flow out. If you are trying to apply the flux on a board that is not flat, such as a board that has through hole components installed, you sort of need to dab around the area to apply the flux. If the board you are trying to apply the flux on is flat you can sort of wipe it to apply the flux. It seems to evaporate quickly when the soldering iron comes in contact with the flux but it does also seem to help with desoldering and getting a once soldered pad free of solder.

used to fit cold solder on my volvo q60 dashboard no issues, it worked and the dash worked. probably wont use it again so cant say it it will last or leak after opening

I am an amateur solderer. When doing research on my new hobby, people recommended Chip Quik. A pen style flux is easy to use and control. However, the tip gets worn very easily, which hinders proper flux application.Aside from that, I like that it's lead free. Customer service is really good. I emailed them about the worn tips and they sent me some replacements. Very nice of them. I'm considering buying their syringe style flux because of their good customer service.

Super simple to use & mess free! I used this coupled with desoldering wire & I was able to replace the lens of my PS2 quickly and with ease. I highly recommend this to anyone looking to work on small projects who don’t want to deal with paste or wax 👍🏻

The flux is great. The problems are, it takes a long time to wet the tip with flux. The tip wears down extremely fast, to the point that is a frayed mess. To make matters worse, the tip has a tendency to actually absorb any flux you lay down on your work surface, defeating the purpose of the flux. It is recommended to use a liberal amount of flux to assist in solder flow, and since this barely deposits any flux you may as well not use any at all.If you can successfully extract a good amount of flux onto your work surface, it actually works really well and doesn't make a big, sticky mess like other products. Unfortunately, this pen is not the best applicator.

This is the BEST soldering paste of its type. Recommended to me by a well-known pc board manufacturer.

It’s a flux pen and it works as intended. 5/5.