This Arctic Additive is designed specifically for R12 refrigeration systems with brass gauges, offering a reliable solution to stop leaks and extend the lifespan of your equipment. Formulated with advanced seal conditioners, it effectively seals minor leaks in compressors, hoses, and fittings, preventing further loss of refrigerant and ensuring optimal system performance. The additive is compatible with mineral and synthetic oils, making it suitable for a wide range of R12 systems. When used as directed, it can help reduce costly repairs and system downtime. Pair it with Brass gauge, featuring a gas pressure gauge and hose, for precise and controlled application. Protect your investment and maintain the efficiency of your R12 system with this reliable oil stop leak additive and high-quality spray gun.