Loctite 55 Pipe Sealing Cord is a non-curing, coated multifilament cord that seals out air and other common gases and fluids. Built-in cutter to easily apply the proper amount of cord. Recommended for sealing metal and plastic tapered pipe threads and fittings up to 4NPT. Allows for post assembly adjustments.General purpose, threaded pipe and fitting sealant, Non curing, immediate, full pressure seal, For a quick, easy and reliable seal