Harris Blockade® Phos-Copper-Tin-Silicon Filler Metal is a premium-quality brazing alloy specifically designed for low-temperature brazing of copper and brass components. Engineered with an advanced phosphorous-copper-tin-silicon composition, it delivers excellent flow characteristics, strong joint integrity, and reliable leak-free performance while reducing the heat required during brazing.
Blockade® is an ideal choice for HVAC, refrigeration, plumbing, and industrial maintenance professionals who require durable and precise brazed joints. The lower working temperature helps minimize heat distortion, protects sensitive components, and improves overall efficiency during installation and repair work.
This filler metal provides smooth capillary action, allowing the alloy to penetrate joints evenly for maximum strength and long-lasting performance. It is widely used in air conditioning systems, refrigeration equipment, copper piping, brass fittings, heat exchangers, condensers, evaporators, and other copper-to-copper or copper-to-brass applications.
Manufactured to deliver consistent quality and dependable results, Harris Blockade® is trusted by technicians and contractors for both new installations and maintenance projects where reliability and performance are essential.
Key Features
- Premium phos-copper-tin-silicon brazing filler metal
- Designed for low-temperature brazing applications
- Ideal for joining copper and brass materials
- Excellent flow and capillary action for clean, strong joints
- Produces durable, leak-resistant brazed connections
- Reduces heat input, minimizing distortion of components
- Smooth melting characteristics for easy application
- Suitable for HVAC, refrigeration, plumbing, and industrial systems
- Consistent alloy composition for reliable performance
- Trusted by professional HVAC and refrigeration technicians
Applications
- HVAC installation and maintenance
- Air conditioning system repairs
- Refrigeration equipment assembly
- Copper pipe brazing
- Brass fitting connections
- Heat exchangers
- Condensers and evaporators
- Refrigeration tubing
- Commercial and residential plumbing
- Industrial copper piping systems
Diameters / Packaging
| Diameters | Packaging | Codes |
|---|---|---|
| 1/8 in (3.2 mm) | 1 ea Tube | BK636R |
| 2.0 mm (0.08 in) | 25 lb Box | BK220R1 |
| 2.0 x 500 mm (0.08 x 19.7 in) | 25 lb Box | BK220R |
| 3/32 in (2.4 mm) | 25 lb Box | BKFC2500R1 |
| BKFC2500R | ||
| BK520R, BK536R |
