18W Easy Gold Paste Solder 18KW easy gold paste solder supplied in a syringe of 1 DWT. This solder has a flow point of 1375 degrees Fahrenheit (746 degrees Celsius) and a melting point of 1300 degrees Fahrenheit (705 degrees Celsius). This Krohn syringe solder comes pre-mixed with flux. The syringe makes it ideal for fine jewellery repairs such as fine chains.