SIL-FOS 15% BRAZING ROD 25EA.

The Sil-Fos 15% Brazing Rod 25EA (often called Sil-Fos 15) is a silver-phosphorus brazing alloy used in HVAC, refrigeration, and plumbing for joining copper tubing.

What it is

This is a 15% silver brazing rod made primarily for:

• Copper-to-copper brazing (no flux needed in most cases)
• HVAC refrigeration lines
• Air conditioning repair
• Plumbing and hydronic piping

Key characteristics

• 15% silver / copper / phosphorus alloy
• Self-fluxing on copper (phosphorus acts as flux)
• Strong, vibration-resistant joints
• Excellent flow into tight copper joints
• Melting range ~1190°F–1475°F

Pack size

• “25EA” means 25 individual rods per pack

Where it’s used

• Air conditioning line sets
• Refrigerator and freezer tubing
• Copper plumbing systems
• Brass fittings (with external flux required)

Simple explanation

It’s a professional-grade brazing rod HVAC techs use to permanently seal copper pipes, especially where refrigerant or pressure lines must not leak.