High strength silver-bearing solder melts and flows at 430° F (221° C). Provides strength without distortion caused by high temperature brazing. Kit contains 1/2 oz. of solder and
1/2 oz. of flux. 
 
I use staybrite for soft soldering settings that have broken off near gemstones that cannot take heat or repairs on costume jewellery. 
 
Krohn KB-430 Soft Solder Paste - I use to add decorations around gemstones
 
Therma Guard Protective Blanket - Used to protect gemstones when soldering or heating around them. Re usable, dip in water and wrap around gemstone before heating.