Loctite 55


Loctite 55 is a general purpose, threaded pipe and fitting sealant which is wound from the dispensing package onto the threads of the pipe. It is supplied in containers, which serve for both storage and dispensing purposes.

Recommended for sealing metal and plastic tapered pipe threads and fittings up to 4″ NPT (National Pipe Thread) for use in industrial applications in aqueous and non-aqueous fluids. Particularly suitable in threaded assembly applications that require immediate use and may undergo small readjustments before use. This product is typically used in applications up to 149°C.

This product may vary on delivery times.

Minimum Order Quantity: 

  • 50 m: 24;
  • 160 m: 48.


NSF International

Certified to ANSI/NSF Standard 61 for use in commercial and residential potable water systems not exceeding 82° C. Note: This is a regional approval. Please contact your local Technical Service Center for more information and clarification.

EN 751-2

Sealing materials for metallic threaded joints in contact with 1st, 2nd, and 3rd family gases and hot water; Part 2: Non-hardening jointing compounds. Loctite 55 has been tested and conforms to EN 751-2 for a class ARp compound and carries the DVGW approval.

WRC and BGA KTW approval

Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on the quality of the water. Loctite 55 has been tested and has potable water approval to BS 6920 and also meets the specifications of the WRC and BGA KTW for both cold and hot potable water.

Additional information



Chemical Type

Dimethacrylate ester




Thread sealing


160 m, 50 m





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