Harris Blockade is a proprietary phosphorus-tin-silicon alloy engineered as an inexpensive alternative to copper-copper and copper-brass alloys.

It is self-fluxing on copper and its lower melting temperature makes it an excellent choice for brass connections. BLOCKADE flows rapidly but can be used to “cap” brazed joints.

Product details

  • Contents: 20 rods
  • Dimensions: 500mm long x 2.0mm diameter


  • Silicon: 0.02%
  • Copper: 86.8%
  • Silver: 6.5%
  • Phosphorus: 6.5%
  • Other: 0.15%