LOCTITE SI 5331

Thread Sealants

Thread Sealant - low strength. Ideal for use on threaded plastic or plastic/metal fittings carrying hot or cold water.

LOCTITE SI 5331 is designed for the locking and sealing of plastic and metal fittings carrying hot or cold water, e.g. industrial and agricultural plastic water pipe systems or drainage systems. It carries certain approvals and certifications: WRC listed, meets BS 6920 for potable water: 0706521DVGW approval, tested in accordance with EN 751-1; P1 NSF Reg. No.: 123620


  • General purpose liquid thread sealant for sealing metal and plastic threads in fittings carrying hot or cold water
  • Locks connection against vibration-induced loosening
  • WRC listed, meets BS 6920 for potable water: 0706521
  • DVGW approval, tested in accordance with EN 751-1
  • P1 NSF Reg. No.: 123620