JEGS thread sealant can be used to seal all threaded joints in plastic, aluminum, stainless steel lines, pipe bungs, bolts and flange seals to name a few. Manufactured from a non-toxic, non-drying compound that consists of non-melting grease and PTFE to provide a positive, leak-proof seal. Includes special additives to prevent corrosion and maintain maximum pressure from -35º to +550º F.