Master Plumber, 4 OZ, Yellow Formula 55 Thread Seal, Yellow Pipe Thread Compound For Lines Carrying LP & Natural Gas, Use On All Metals, Plastic PVC, CPVC, ABS & Nylon, Tolerates - 50 Degrees Fahrenheit To + 400 Degrees Fahrenheit, Gas To 3000 PSI, Liquid To 6000 PSI, Slow Drying, Never Seizes, Allows Easy Disassembly, UPC Listed, Jar.