A Higher Level of Leak Detection:

The Original Big Blu family of bubble leak detectors are used by OEM’s and industry professionals worldwide. Our fluids are strong, persistent film forming liquids that are the only bubble/foam indicators capable of detecting gas leakage down to 0.65 ounces per year. Use on any gas including Oxygen.

Big Blu is the original spray on leak detector.

Big Blu Subzero is freeze protected to -30F.