Essmetuin No Clean Soldering Flux Paste(4Pack), Solder Flux for Electronics Soldering, Tin Soldering, Lead-Free Rosin Soldering Flux for Circuit Boards and Copper Electrical Wire

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Real human review here!!! This Flux is pretty fantastic, considering the price. I typically use Amtech ot Stirri, which are both world class, but this Essmetuin will get the job done, almost, as good, for a fraction of the price. I spent some time doing coin cell battery replacement on some of my Super Nintendo games and this Flux was a breeze to work with. It keeps the solder flowing and has great wetting action. All of my joints came out solid and nice and shiny. It didn't smell bad or smoke any more than the better Flux brands that I've used. It also didn't caramelize and harden after use, which I've definitely had happen with some other brands. It is a tacky Flux, but I wouldn't call it overly sticky and it's not ridiculously thick. When dispensing it from the syringe, I would say it has the consistency of something like pudding. But, it obviously flows out of the syringe nice and smooth. And although this is a no-clean Flux, you will probably want to clean it off your PCB if that's what you're working with. Some Q-Tips or a toothbrush and isopropyl alcohol will make short work of any leftover residue. But, if you really don't care, you don't have to clean it up. It won't hurt anything. This Flux isn't any messier or harder to clean than the other brands I've used. Every tacky Flux is going to require some clean-up if you want everything to be, not a bit sticky, when you're finished. For the price, I don't think you can beat this quantity. If you wanted 4 syringes of Amtech or Stirri, you're going to pay 3-4x the price. And those brands are awesome, but the Essmetuin is probably (almost) as good, for 99% of projects.

I can't say this is the best flux I've ever used, but it's pretty good and definitely gets the job done. It is relatively thick and stays in place until heated. I'm a fan of the included needle ends since they make precise application easy. The best thing about this flux is really just the sheer quantity you get for your money.

Excellent. Some solder paste breaks me out badly this seems work excellent on old solder joints, flows really well.

I recently purchased the Essmetuin No Clean Soldering Flux Paste (4Pack) for various electronics soldering projects, and I am thoroughly impressed with its performance. This solder flux is a game-changer, especially for those who engage in tin soldering and work on circuit boards and copper electrical wires. The most striking aspect of this product is its "no clean" feature. It significantly simplifies the soldering process by eliminating the need for post-soldering cleanup. This not only saves time but also ensures that the soldered components maintain a neat and professional appearance. The consistency and quality of the flux paste are excellent. It adheres well to soldering surfaces, providing a smooth and even application that greatly enhances the soldering process. This consistent quality is vital for precision work on circuit boards and electrical connections, where accuracy and reliability are paramount. Another commendable aspect is that the Essmetuin flux is lead-free. This makes it an environmentally friendly choice and aligns with health and safety standards, which is increasingly important in electronics work. Each pack in the 4-pack set is a testament to the thoughtfulness of packaging. The containers are well-sealed, ensuring the flux remains fresh and free from contamination. This attention to detail in packaging reflects the overall quality and professionalism of Essmetuin as a brand. In conclusion, the Essmetuin No Clean Soldering Flux Paste is an outstanding product for anyone involved in electronics soldering. Its ease of use, high quality, and environmentally friendly composition make it a top choice for both hobbyists and professionals. I highly recommend this product for your soldering needs; it truly enhances the efficiency and quality of soldering work.

Solid 4 stars. I'd give it 5 if I hadn't used hand made flux that you just can't complete with. I solder nearly every day and was in a pinch and needed flux, not sure how I didn't have some somewhere but I didn't. Does well with hot air and iron work. Stays where you put it, doesn't run from the iron. Slightly more work cleaning it, kind of funny they call it No Clean, you have to clean it. Does go dark on you will high temps, but I'm talking 400°C, any normal temp it stays clear. I don't what else to say, comes with plunger and needles. Then the price, I haven't spent this little on flux since the 90's in Engineering School, crazy inexpensive. I'd give it a big thumbs up!