RL-428-OR RELIFE 100g Flux Paste For Mobile Soldering Paste Halogen-free Good Activity Viscosity Insulation Resistance. Purpose: Facilitates soldering by cleaning metal surfaces and preventing oxidation. Composition: Contains imported rosin, ensuring purity and effective tinning. Properties: Features high viscosity, strong activity, and high insulation resistance. Application: Suitable for soldering and reballing PCBs, and repairing mobile phones and CPUs. Residue: Leaves minimal residue after soldering, ensuring smooth conductivity. Wetting: Designed for superior wetting, promoting reliable solder joint formation. Halogen-Free: This paste is halogen-free. Manufacturer: Made by Guangzhou Sunshine Electronics Technology Co.