Steel Brake Line Repair with SSQ-6 Silver Solder

Learn how to perform a steel brake line repair with silver solder paste.

This 2006 Dodge Sprinter brake line was damaged when a wiring harness rubbed through the protective plastic coating. After the steel line was exposed, the brake hose rusted and cracked–which then became a sizeable leak. The aftermarket part was not available, so we headed to Jack’s Madrona Autoworks in Olympia, Washington and made the repair in seconds with SSF-6 silver solder paste and a propane torch.  We used a propane torch for this application, but SSQ-6 can also be used with MAPP gas or oxyacetylene.

Steel brake line rub throughs can also be caused by improper installation, which force the tire to rub against the brake line.   When this occurs, many repair shops replace steel brake lines with expensive and hard to find replacement parts, but as you can see, replacement is not necessary thanks to SSQ-6.  This cadmium-free high-strength silver solder is conveniently packaged in a 1 oz dispenser to facilitate one handed, low pressure applications in any position without seepage.

Tip:  it’s important to use gentle pressure on plunger to avoid breaking the applicator.

We first used a sanding disc to clean the rust off the line, then squeezed out a dot of SSQ-6 56% silver solder paste onto the crack and heated the parent metal with a propane torch.  Notice the solder paste flattens out and turns shiny as heat is applied.  SSQ-6 flux is incorporated into the solder and can easily be removed with warm water.

The resulting repair is 80,000 psi..

SSQ-6 56% silver solder can also be used on cast iron, copper, stainless steel, bronze, copper, mild steel, carbon steel, tool steel, and chrome-moly individually or in any combination.


NotePlease observe all AWS Safety & Health Guidelines when using Muggy Weld products.

Caution: Do not store near edible items. If you refrigerate SSQ-6, please store in a “chemical only” designated refrigerator.