---
product_id: 14489722
title: "Stainless Steel Soldering Flux – 1 Pint Bottle | Industrial-Grade Acid Flux for Steel, Brass, Nickel & Hard-to-Solder Metals | Fast Acting, Strong Bond, Made in USA"
brand: "rubyfluid"
price: "$62.07"
currency: USD
in_stock: true
reviews_count: 13
category: "Rubyfluid"
url: https://www.desertcart.us/products/14489722-stainless-steel-soldering-flux-1-pint-bottle-industrial-grade-acid
store_origin: US
region: United States of America
---

# Fast-acting solder wetting Industrial-grade acid formula Made in USA since 1903 Stainless Steel Soldering Flux – 1 Pint Bottle | Industrial-Grade Acid Flux for Steel, Brass, Nickel & Hard-to-Solder Metals | Fast Acting, Strong Bond, Made in USA

**Brand:** rubyfluid
**Price:** $62.07
**Availability:** ✅ In Stock

## Summary

> 🔥 Master the art of tough metal soldering with Rubyfluid – where strength meets precision!

## Quick Answers

- **What is this?** Stainless Steel Soldering Flux – 1 Pint Bottle | Industrial-Grade Acid Flux for Steel, Brass, Nickel & Hard-to-Solder Metals | Fast Acting, Strong Bond, Made in USA by rubyfluid
- **How much does it cost?** $62.07 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/14489722-stainless-steel-soldering-flux-1-pint-bottle-industrial-grade-acid)

## Best For

- rubyfluid enthusiasts

## Why This Product

- Trusted rubyfluid brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Generous 1-Pint Value:** Durable, resealable bottle designed for heavy-duty use and long-lasting supply.
- • **Heritage of Excellence:** Proudly made in the USA since 1903, delivering consistent, professional-grade results every time.
- • **Engineered for Tough Metals:** Specially formulated for stainless steel, nickel, brass & other hard-to-solder surfaces where ordinary fluxes fail.
- • **Rapid Wetting & Strong Bonds:** Promotes quick solder flow and corrosion-resistant joints that last in demanding environments.
- • **Industrial-Strength Reliability:** Powerful acid-based flux trusted by pros in HVAC, metalworking, and fabrication shops.

## Overview

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.

## Description

Rubyfluid Stainless Steel Soldering Flux – Engineered for Hard-to-Bond Metals Tackle the toughest soldering jobs with Rubyfluid Stainless Steel Soldering Flux, purpose-built for stainless steel, nickel, and other challenging metals. This industrial-strength acid flux is trusted by professionals in HVAC, metalworking, manufacturing, and precision fabrication for its ability to break through oxidation and promote strong, durable solder joints—even on the most stubborn surfaces. Unlike general-purpose fluxes, Rubyfluid’s stainless steel formula is optimized for high-temperature performance, rapid wetting, and superior bonding strength. Use it on fittings, sheet metal, appliances, or assemblies where clean, lasting joins are critical. Proudly made in the USA since 1903, Rubyfluid continues to set the standard in specialty soldering fluxes. Available in a convenient 1-pint size for efficient shop use. Contains Zinc Chloride and Hydrochloric Acid, not for electronics use.

Review: 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.
Review: Best stainless soldering past - I'm using regular soldering past for stainless. But dose not work good. I try using this product, perfect work.

## Features

- Designed for Stainless Steel & Tough Metals – Specially formulated for stainless steel, nickel, brass, and other hard-to-solder surfaces where general fluxes fail.
- Strong, Reliable Solder Joints – Promotes rapid wetting and uniform flow to ensure high-strength, corrosion-resistant connections in demanding environments.
- Industrial-Grade Acid Flux – Powerful acid-based formula for professional applications; ideal for fabrication, repair, HVAC, and metalworking shops.
- Made in the USA Since 1903 – Trusted for over a century, Rubyfluid’s fluxes deliver consistent results for tradespeople and manufacturers alike.
- 1 Pint Value Bottle – Durable, resealable container for extended use; perfect size for shop floors, toolkits, and heavy-duty projects.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Images

![Stainless Steel Soldering Flux – 1 Pint Bottle | Industrial-Grade Acid Flux for Steel, Brass, Nickel & Hard-to-Solder Metals | Fast Acting, Strong Bond, Made in USA - Image 1](https://m.media-amazon.com/images/I/51aUbz145ML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Marklin model rail soldering
*by E***J on January 12, 2026*

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.

### ⭐⭐⭐⭐⭐ Best stainless soldering past
*by A***R on September 13, 2025*

I'm using regular soldering past for stainless. But dose not work good. I try using this product, perfect work.

### ⭐⭐⭐⭐⭐ Excellent Flux
*by A***A on April 13, 2023*

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!

## Frequently Bought Together

- Rubyfluid Stainless Steel Soldering Flux – 1 Pint Bottle | Industrial-Grade Acid Flux for Steel, Brass, Nickel & Hard-to-Solder Metals | Fast Acting, Strong Bond, Made in USA
- Essmetuin Special Core Solder Wire For Stainless Steel/Nickel Sheet/Zinc Flake/Copper/Iron Sheets/Aluminum Soldering, Multifunctional Core Solder Wire 1.0mm(0.04in) 1.4oz/2pack
- Special Flux in Solder Wire, for Soldering Stainless Steel, Iron Sheets, etc., Multi-Functional Solder Wire (100g)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-05*