Canadian owned and operated
For professional welders and HVAC technicians, Harris Sil-Fos 5 is the legendary standard for copper pipe joining. Whether you are installing a new air conditioning unit, repairing a refrigeration line, or running medical gas piping, this 5% silver alloy gives you the confidence that your joints will hold up under pressure. This 25lb box is perfect for contractors and shops that go through consumables quickly and need a consistent, high-quality supply.
Why choose Sil-Fos 5 over cheaper alternatives? It's all about the flow and the finish. The 5% silver content makes the rod flow smoother than basic phos-copper rods, but it still has enough body to bridge gaps if your pipe fit-up isn't perfect. It creates a strong, ductile fillet that resists cracking from the vibration of A/C compressors. Plus, the flat shape of the rod makes it easy to manipulate around the back of a pipe in tight spaces, ensuring you get a complete seal without wasting material.
The best part about using Sil-Fos 5 on copper lines is the speed. Because it is self-fluxing on copper, you don't have to waste time applying paste flux. Just clean the metal, heat it up, and flow the rod. It wets out beautifully and leaves a clean, professional-looking joint that inspectors and customers appreciate. For brass fittings, just add a little Stay-Silv flux, and you are good to go. Stock up with this 25lb bulk pack and ensure your truck is ready for the busy season.
| Additional Information |
|---|
| Silver Content (%):5% |
| Diameter (mm):Flat |
| Packaging Description:25lb tube |
| AWS Classification:BCuP-3 |
| Material Composition:80% Copper, 15% Phosphorus, 5% Silver |
| Melting Point:Solidus 1190°F, Liquidus 1495°F |
| Form:Flat Rod |
| Length:36 in |
| Applications:HVAC/R, Plumbing, Copper Brazing |
