This flux overlaps with Easy-Flo but is better suited when prolonged heating is necessary. It's disadvantage is a glassy residue which is insoluable in water and must be removed using caustic soda or mechanical methods . Needs to be mixed to a paste with water.

Quantity: 500 grams

Working Temperature: 600-900°C

Conditions for use: Tenacity™ No. 5 flux powder should be mixed with water and a few drops of liquid detergent to form a thick paste.

Paste should then be brushed onto the joint surfaces before assembly. Further flux should then be applied externally either side of the joint mouth.

It is good practice to mechanically clean and degrease the joint surface before applying flux. Heat slowly and evenly to the brazing temperature, without local overheating.

Use the flux as a temperature guide - it will become clear or opaque as brazing temperature is approached. If blackening of the flux occurs this is often a sign of insufficient flux, overheating or flux exhaustion.