The KAILIWEI UV-559 is a professional-grade, lead-free and no-clean soldering flux paste, specially formulated for high-precision electronics assembly and repair. Manufactured under the trusted "维修佬" (WeiXiuLao) brand, this 100g flux paste features a high-activity rosin formula that effortlessly removes oxidation, enhances wettability, and improves solder joint strength. Its advanced formulation leaves no conductive or corrosive residues, eliminating the need for post-soldering cleaning. Ideal for BGA rework, chip tinning, LED soldering, and general PCB work, the KAILIWEI UV-559 is the dependable choice for professional repair technicians and discerning hobbyists who require superior performance with every use. 

Key Features

1. Lead-Free & No-Clean Formula – This flux paste is lead-free and designed as a no-clean product. After soldering, it leaves behind only a minimal, transparent, non-conductive, and non-corrosive residue, which requires no additional cleaning, saving you valuable time and effort on every repair. 
2. Excellent Solderability & Wetting – Its powerful, high-activity rosin formulation effectively removes oxides from metal surfaces, significantly improving solder flow and wettability. This results in bright, reliable, and mechanically strong solder joints. 
3. Halogen-Free & Environmental Safety – Compliant with RoHS 2.0 standards, the KAILIWEI UV-559 is halogen-free and non-toxic. It does not produce harmful residues or excessive smoke, ensuring a safer work environment. 
4. High Insulation Resistance & Non-Corrosive – The flux is engineered with high anti-aging properties and exceptional electrical insulation. It will not become conductive after soldering, effectively preventing the risk of short circuits on high-density PCBs. 
5. Gel Consistency for Precise Application – The unique gel formula has a balanced, creamy consistency. It stays where you put it without running, making it ideal for applying precisely on BGA pads, under SMD components, or in hard-to-reach areas.