LOCTITE® SI 5331

Known as LOCTITE 5331

Features and Benefits

A 1-part, silicone-based thread sealant for metal and plastic pipe systems carrying hot or cold water.
LOCTITE® SI 5331 is a low-strength, general-purpose thread sealant for locking and sealing plastic and metal fittings carrying hot or cold water, e.g. industrial and agricultural plastic water pipe systems or drainage systems. This acetoxy silicone-based medium-viscosity sealant cures at ambient temperature to form a flexible seal. It’s WRC listed, meets BS 6920 for potable water: 0706521 DVGW approval and is tested in accordance with EN 751-1; P1 NSF Reg. No.: 123620.
  • Ideal for fittings carrying hot or cold water
  • Works on metal or plastic 
  • WRC listed, meets BS 6920 for potable water: 0706521
  • P1 NSF Reg. No.: 123620
  • DVGW approval, tested in accordance with EN 751-1
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Technical Information

Agency approvals / certificates / specifications DVGW, NSF, WRAS
Breakaway torque, Steel M10 1.5 N·m (13.0 in./lb. )
Color White
Key characteristics Disassembly: easy disassembly
Operating temperature -55.0 - 150.0 °C (-65.0 - 300.0 °F )
Recommended for use with Metal, Plastic
Viscosity 50000.0 mPa·s (cP)