LOCTITE 638 - Thread Sealant for Hydrogen Application

Henkel Adhesive Technologies

  • Fast anaerobic curing adhesive with high shear strength.
  • Ideal for BSPT and NPT pipe threads.
  • The product has been deemed hydrogen ready for use on metal fittings only.
  • Desinged for bonding for shafts, gears, pulleys and similar cylindrical parts.

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LOCTITE 638 - Thread Sealant for Hydrogen Application

  • LOCTITE 638 is a green, medium viscosity, fast anaerobic curing adhesive with high shear strength.
  • Typically used to retain bearings on shafts and other cylindrical assemblies, but it is also ideal for thread sealing and threadlocking applications exposed to high pressure and/or extreme condition environments.
  • Ideal for BSPT and NPT pipe threads.
  • The product has been deemed hydrogen ready for use on metal fittings only, according to GASTEC QA AR 214. Class 8.

Key features

  • Desinged for bonding for shafts, gears, pulleys and similar cylindrical parts.
  • Also ideal for thread sealing and threadlocking applications exposed to high pressures or extreme environments.
  • Hydrogen ready for use on metal fittings according to GASTEC QA AR 214. Class 8.
  • DVGW Approval (EN 751-1): NG-5146AR0619.

Product specifications

  • Technology: Acrylic.
  • Chemical Type: Urethane methacrylate.
  • Appearance (uncured): Green liquid.
  • Fluorescence: Positive under UV light.
  • Viscosity: High.
  • Cure: Anaerobic.
  • Secondary Cure: Activator.
  • Application: Retaining.
  • Strength: High.

Applications

  • Designed for the bonding of cylindrical fitting parts, particularly where bond gaps can approach 0.25 mm and where maximum strength at room temperature is required.
  • Typical applications include locking bushings and sleeves into housings and on shafts.

Contact us

  • Henkel provides suitable sealant and adhesives for the hydrogen value chain. Interested? Please contact Henkel by filling in the RFQ or contact vendor form.
Brand LOCTITE
Max Pressure (in bar) 1500
Manufacturing Readiness (MRL) 10
Technology Readiness (TRL) 9
Compliant with Kiwa Standard AR 214
Max Ambient Temperature (in °C) 180
Min Ambient Temperature (in °C) -55
Henkel Adhesive Technologies

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Henkel's Adhesive Technologies business is world’s number one producer in adhesives, sealants and functional coatings for industrial customers as well as for consumers and craftsmen. Being industry and application experts across manufacturing industries worldwide, we work closely with our customers and partners to create sustainable value for all stakeholders – with high-impact solutions based on an unmatched technology and trusted brand portfolio.

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