Nu-Calgon Cal-Blue Plus Micro Leak Detector (Model 4182-24) is a professional-grade leak detection solution designed for HVAC, refrigeration, and gas system service. This 1-quart trigger spray bottle features a high-viscosity formula that produces long-lasting blue bubbles, allowing the solution to stay in contact with the surface longer and clearly identify even the smallest leaks.

Cal-Blue Plus is non-corrosive to metals, helping preserve the integrity of piping, tubing, and fittings during repeated service checks. It is safe for use with all refrigerants, natural gas, and oxygen, and it will not interfere with ultraviolet (black) light detection methods. Easy to apply and highly visible, this micro leak detector is trusted by technicians for accurate diagnostics in residential, commercial, and industrial applications.

Designed for durability and consistent performance, the trigger spray bottle makes Cal-Blue Plus convenient for everyday field use where fast, reliable leak detection is critical.