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LOCTITE 55 – Universal thread sealant for metal and plastic pipe threads

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Ideal for water, gas, hydrogen, and drinking water applications. Approved according to DVGW, KIWA, NSF, WRAS, EN 751-2, BS 6920

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thread sealant

 
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Shipping usually within 1–3 business days
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HS code: 59119000000

LOCTITE 55 – Universal thread sealant for metal and plastic pipe threads

LOCTITE 55 is an instant thread sealant for fast, secure, and flexible sealing of metal and plastic pipe threads—ideal for water, gas, hydrogen, and drinking water applications.

Product description

LOCTITE 55 is a multifunctional, coated polyamide thread with a chemically inert special paste that is used as a sealant for conical and cylindrical metal and plastic pipe threads. The product is wound directly onto the thread from the practical dispenser can and provides an immediate, reliable seal without any curing time. LOCTITE 55 is universally applicable for cold and hot water, drinking water, gas (including LPG and hydrogen), and numerous industrial media.

Unlike PTFE tape, LOCTITE 55 can be turned back up to 45° after assembly without losing its sealing effect – ideal for flexible adjustment of fittings and screw connections. The seal remains permanently reliable, even under vibration, temperature fluctuations, and pressure loads of up to 69 MPa. The product is suitable for immediate use and facilitates quick assembly on site or in the workshop.

Thanks to numerous international approvals (including DVGW, KIWA, NSF, WRAS, EN 751-2, BS 6920), LOCTITE 55 is approved for use on drinking water, gas, and hydrogen pipes, as well as for commercial, industrial, and private installations. The sealant is steam-compatible and resistant to many industrial liquids and gases.

product features

  • Technology: coated polyamide multifilament thread
  • Color: white
  • Sealing effect: immediate, no curing required
  • Temperature range: -10 °C to +149 °C (briefly up to 150 °C)
  • Pressure resistance: up to 69 MPa
  • Media resistance: Water, hot water, gas, hydrogen, steam, oil, many industrial media
  • Reversibility: adjustable up to 45° without leakage
  • Spool sizes: 12 m, 50 m, 100 m, 160 m
  • Specific gravity: 1.25
  • Coating application: 0.54–0.74 g/m
  • Lubricity (K value): 0.15–0.16 (ASTM D5648)
  • Storage: 8 °C to 21 °C, store in a dry place

Approvals and certifications

  • DVGW/KTW (gas & drinking water)
  • EN 751-2 Class ARp
  • ANSI/NSF Standard 61 (drinking water up to 82 °C)
  • WRAS (British Standard BS 6920 for drinking water)
  • KIWA GASTEC QA AR 214 (hydrogen gas mixtures up to 100% hydrogen)
  • Australian Gas Association
  • WRC and BGA KTW for cold and hot drinking water

Suitable materials

  • Metal pipe threads (steel, brass, copper, galvanized, etc.)
  • Plastic pipe threads (e.g., PVC, PP, PE)

Typical areas of application

  • Sealing water, heating, and gas pipes
  • Installation of drinking water and hot water systems
  • Sealing of hydrogen and gas pipes
  • Pipe fittings in industry and plant engineering
  • Building services, plumbing, heating, air conditioning
  • Installations with steam, compressed air, or aggressive media

Processing instructions

  1. Cleaning: Clean the thread with a wire brush before application.
  2. Application: Place the end of the thread approximately two threads from the end on the external thread and hold it in place.
  3. Wrapping: Wind the thread in the direction of the thread onto the pipe thread, fill the thread base (number of wraps depending on material and diameter, e.g., 6–8 for ½" metal, 12–15 for ½" plastic).
  4. Cutting: Cut the thread with the integrated cutting tool and place the loose end on the thread.
  5. Assembly: Screw fittings together; readjustment up to 45° possible.
  6. Immediate sealing effect: The system can be put into operation immediately after installation.

product specifications

Physical properties
Color white
product information
container 50 m or 160 m
brand Loctite
Official approvals / Certificates / Specifications DVGW, KTW, NSF, WRAS
product type Thread seals, industrial sealants
operating temperature –20°C to +150°C
readjustability Up to 45° without risk of leakage
Uncategorized
technology names Pipe sealants, tapes, and rolls
keywords
keywords
thread sealant