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                           RL-420S-UV is BGA lead-free syringe type flux with free 2 needles and push rod with high activity, purity which is easy to solder without any cleaning. There is not any resistance and conductivity and lead is also environmentally friendly. Hence, cleaning and repairing is not required. Welding is not wasteful, more precise, and the sealing plug can be reused many times after use.

                          The thinness is good with good wettability, and exquisite paste, which is suitable for welding on metals such as general instruments, meters, tubes, tin, iron, etc. So, the application is also more even. Solder joints become bright after soldering, because after reflow, little residue remains with light color, , no corrosion, high impedance, high purity, and long-lasting viscosity. 

                         Scope of this product is very wide. It is widely used and also suitable for sensor, wire, SMT repair, circuit welding, tablet phone computer repair, home appliance repair, etc. Using this product is also not so difficult and the steps for its usage is also very simple, but you have to keep one thing in consideration, that the demonstration is only the method, you need to decide according to the actual situation. 

                         First of all, counterclockwise to open the cap, after opening its cap, rotate clockwise and install the needle. After that, open the bottom cover, but don’t remove the white rubber plug in the syringe, that is not allowed to remove. Finally, attach the push rod and now you are ready for use.