Solder Wire and Rosin Paste Flux Kit - 60-40 Tin Lead Rosin Core Solder Wire (0.6mm, 100g) and Rosin Paste Flux for PCB Electrical Soldering and DIY from Plusivo - Amazon.com
HOW TO: Solder wires with FLUX and heat shrink. - YouTube
1 Gallon Still Kit Solder Flux Package – Clawhammer Supply