CS-Flux 5g Low Viscosity Halogen Free Lead Free Liquid Flux for BGA Component Rework Reballing Reflow Ideal for VGA GPU Repairs and Microsoldering

I use this product for electronic repair and kit building while producing YouTube content, its important that the items I use work well, this flux is very good no issues at all. I will happily order again with no reservations at all.. Good product, works well..

Useful and good quality.

I used to look at circuit boards the same way I look at advanced calculus—completely baffled and mildly terrified. BGA rework, reballing, reflow… that all sounded like specialized wizardry way beyond my humble skill set. Yet there I was, staring at a dead GPU that needed resurrecting, fully prepared for a comedic disaster of burnt fingers and smoking components. Then I discovered this liquid flux, and my soldering universe flipped on its head. The first time I used it, I felt like I’d stumbled onto the secret ingredient in an ancient alchemy recipe. One drop of this stuff, and my solder started flowing exactly where I wanted it. I didn’t realize flux could be so obedient—it was like it was politely asking, “Where to, boss?” That’s when I decided to tackle the dreaded BGA rework for my ailing graphics card. A bit of flux here, a gentle nudge with my hot air station there, and suddenly those solder balls fell into perfect alignment as if performing a synchronized swim. No bridging, no burnt pads, no meltdown. For the first time in my life, I felt like I was playing on “easy mode” in a process that’s usually reserved for the soldering elite. Emboldened by this success, I ventured deeper: reballing another chip, performing some microsoldering repairs on a friend’s GBU board—things I used to only watch on YouTube, mouth agape. With this flux in my arsenal, everything just clicked into place, quite literally. And because it’s halogen free and lead free, I didn’t feel like I was unleashing a chemical apocalypse in my tiny workshop. In the end, my formerly useless GPU sparked back to life, sending glorious pixels dancing across my screen. I sat there, triumphant, wondering how on earth I’d gone so long without this magical little bottle in my tool kit. Sure, I still might not crack advanced calculus, but at least I can bring a fried circuit board back from the brink—and with style. Now, I’ve learned one big lesson: if your soldering iron feels more like a wand, this flux is the spell that makes the magic happen. Your resurrected electronics (and your newly boosted confidence) will thank you.

Overall it's good flux for BGA reflow or general surface mount component work. Not smokey at all. Doesn't burn at up high temperatures but you'll have to clean the board quite thoroughly after because the left over flux that spreads around especially if you're using hot air is very sticky.

Bought this to reflow a gfx chip on an Apple MacBook Pro and found it super easy to use and great quality

CS-FLUX Low viscosity Halogen-free liquid flux for BGA component rework reflow 5g Ideal for VGA GPU repairs great flux ordering more soon

Amazing stuff, not a lot in it but high quality so I can’t complain. No burnt residue just good flux!

Rubbish and isn't the same product as previously ordered. Watered down and half the quantity for double the price

よく溶けて、溶けた状態でイモハンダになりにくく、光沢があるハンダが可能です。 ブロワーにてチップ部品やモスフェットをハンダする際に使用しています。

Fait le job

Does what you need

I purchased this flux for use with soldering components with a solder iron. I was concerned when I received it and watched the instructions which say it's important to heat it with a gun as it's pushed out from the syringe, but that is only necessary for BGA rework. If you're like me and squirting it onto a board, then applying an iron + solder wire, this stuff works great. It's slightly white at room temp and turns clear when heated so it doesn't get in the way when soldering, though in some cases it can be hard to detect how much is on the board when it's clear so that might come down to personal preference. It might be costly for the amount you get, but the tiniest amount goes a long way. I have no idea what it's made of, that seems to be a company secret, but it worked great for me and I'll be using this as my primary flux.

Pretty good does its job