... .Flux stop evaporation, keep proper BONKEN Bon-102 flux pen / soldering pen / welding pen Character & advantage:1. excellent Operability, easy to carry2. flux ... drip5. Full of alcohol can be used for cleaning brushes6. pen body transparent, clear marginUses:1. Before welding, flux coated on ... (prohibiting the use of organic solvents) BONKEN Bon-102 flux pen / soldering pen / welding pen