What form does silver brazing flux typically come in?

Silver brazing flux is commonly available in paste form because this consistency allows for easy application and adherence to the surfaces being brazed. The paste form is designed to stay in place during the heating process, which is crucial for effective bonding. The flux needs to cover the joint area sufficiently to protect it from oxidation and to facilitate the flow of the filler metal.

While liquid, tablet, and powder forms exist for other types of soldering or brazing applications, the paste form specifically offers a balance of viscosity and coverage that is particularly advantageous when working with silver-based filler metals. This form can easily be applied to both surfaces being joined, ensuring adequate protection and promoting the right flow dynamics during the brazing process.