Flux-Aquiflux 8oz AquiFlux is the best flux available. It is a self-pickling flux, meaning it actually cleans the metal of small contaminants and oils, allowing solder to flow more smoothly and adhere more solidly. AquiFlux is for hard soldering from temperatures up to 1600*, and is perfect for Gold, Silver, and Platinum. Plus, it's water based formula makes for easy cleanup. Size: 8 fluid ounces