Sealweld Pack King #301 is a putty-type PTFE packing compound made from a 100% synthetic base formulated as an injectable packing for valve stems, packing glands and stuffing boxes. Designed to mold around valve stems and pump rods to form a drip-tight seal where other sealing procedures prove ineffective. Sealweld Pack King #301 exhibits an extremely low coefficient of friction and is resistant to most chemicals and solvents. Resistant to today's most exotic products and ideal for condensate service. Sealweld Pack King #301 is also available in bulk containers for use as a flange sealant.