Say goodbye to messy soldering jobs with the Griffon S-39 Universal Soldering Fluid. This acid-free miracle worker is your go-to for soft soldering all metals (sorry, aluminum, not invited) in every job under the sun. Whether you're fixing up a boat engine or tinkering with your steel drum band setup, this fluid's got you covered. Just grab your brush, apply effortlessly, and watch as it works its magic, cleaning like a pro and handling up to a scorching 375°C. Oh, and don't even think about sipping it - it's strictly for metal bonding, not happy hour!