PISTON SEAL CONSTRICTOR can constrict the seals and make it close to the groove.
Instructions for use:
1. After heating or soften the PTFE seal, use cloth tapes to bind both sides of the seal, and enter into the groove along the edge of the piston;
2. Circle the seal with cloth, use the constrictor to tighten. It will take 3 to 5 minutes to reach the restoring effect.