Multipurpose paste flux, mid to dark brown Designed for engineering and sheet metal work Suitable for both lead-containing and lead-free solder alloys WRAS approved (No. 2101538) for use in both hot and cold water systems
SRA Solder 135 Rosin Paste Soldering Flux for Electronics, No Clean Flux Made for Lead and Lead-Free Solder Circuit Boards and Copper Electrical Wire - Safe Residues with No Goopy Mess (2oz 2-Pack)