

🔥 Master the art of tough metal soldering with Rubyfluid – where strength meets precision!
Rubyfluid Stainless Steel Soldering Flux is an industrial-grade acid flux designed specifically for stainless steel, nickel, brass, and other challenging metals. It ensures fast wetting and strong, corrosion-resistant solder joints, making it ideal for professional HVAC, metalworking, and fabrication applications. Packaged in a durable 1-pint resealable bottle, this USA-made formula has been trusted by tradespeople since 1903 for reliable, high-performance results.
| ASIN | B007BGYQEC |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #21,167 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #32 in Soldering Flux |
| Customer Reviews | 4.6 4.6 out of 5 stars (251) |
| Date First Available | February 20, 2012 |
| Item Package Quantity | 1 |
| Item Weight | 1.32 pounds |
| Item model number | FLSRUBYFLUIDSS |
| Manufacturer | Superior Flux |
| Material | stainless steel |
| Part Number | RUBYFLUIDSS |
| Product Dimensions | 7.8 x 2.1 x 1.5 inches |
| Usage | Jewelry |
E**J
Marklin model rail soldering
I used it to solder wires to the model rails. Worked great! This big bottle will last you a very long time, you need just a few drops for each solder joint.
A**R
Best stainless soldering past
I'm using regular soldering past for stainless. But dose not work good. I try using this product, perfect work.
A**A
Excellent Flux
I bought this flux to solder stainless steel BBQ skewers which I cut and fashioned into what you see in the picture. I had never soldered before and read that solding stainless steel was difficult and a special acidic flux was necessary. I was able to turn BBQ skewers into these geometric shapes for a wedding. I must say that there was a definite learning curve and the flux was a MUST to get the solder to flow but once I got the hang of it,it was a breeze. I HIGHLY recommend this stuff if you are soldering stainless steel. Beyond that I have no knowledge or experiences with soldering. As others have said YOU MUST WASH IT OFF AFTER or it is corrosive. I washed with mild dish detergent and thoroughly dried each shape (72) and had no problems. Another note, the bottle did swell and I had to loosen the lid after a few days. As I said I know nothing about soldering other than what I made so good luck. I couldn't get the solder to stick or flow without this stuff so I have to say it's a definite buy!
B**I
The item perform as described by the site.
The item has a good substance combination to work as described, and it works fine. It may contain hydrochloric acid, HCL; therefore, do not breathe the fume.
C**N
Don't flux around...
Haven't opened this one yet due to the fact that I'm still using my other bottle. This liquid flux is amazing.
G**H
Did the job
Works perfect!
R**T
Good for stainless steel and copper
Of you are trying to solder and need good flux, this is it. If you are trying to solder copper to stainless steel, then don't even try it without this flux
R**S
Best hobby flux
Works great just make sure it’s well ventilated before using!
C**I
Works exactly as good as advertised Brazing copper pipe to stainless As easy as it could be Absolutely amazing product
C**P
While the amount/size is way more than I need and it is pretty expensive, this stuff works like a charm for soldering stainless steel to copper!
C**N
Awesome product, great company
R**K
If you need to solder stainless steel, you must use the right flux. This one worked very well re-soldering a leaky spout on my wife's stainless steel kettle.
S**W
The item was exactly what we wanted.
Trustpilot
3 weeks ago
2 months ago