Blockade^®, a proprietary phosphorous-tin-silicon alloy engineered to provide a low cost alternative to silver bearing filler metals.
Self-fluxing on copper and low melting temperature makes Blockade^® an excellent choice for brass.
Parts of Blockade^® liquify faster than others, filling the capillary rapidly while less liquid parts of Blockade^® forms a 'cap' around the top of the connection.

Being a silicon braxing alloy, Blockade^® offers significant advantages over phos/copper and silver/phos/copper brazing alloys with noticable effects:

• Outstanding ability to form a large 'cap' at the braze connection
• Distinct, favourable colour changes in the finished braze alloy
• Improved ductility over non-silver-bearing brazing alloys
• Brazes brass and brass alloys with ease, without addition of silver
• Significantly reduces brazing temperatures
• Enhances the favourable colour change

Extreme ease of use, without the need for brazing experience, even the novice can easily make a very good 'cap'.