Trace 2 Leak Detector;A Red Penetrant Dye In A Polyolester Base That ;Is Completely Compatible With All Refrigerants And;Lubricants.;Use To Locate The Hardest To Find Leaks Under The Toughest;Conditions In Low Light Or Dark Areas.;Leaks Show As Bright Red Stains.;For Refrigeration And Hydraulic Systems.;Fluorescent With Any Ultraviolet Light Source.;Non-Volatile And Will Not Sludge Or Deposit Gum.;Clearly Visible, Even Through Ice And Frost.;4 Oz.