LOCTITE? Product Vibra-Seal® 503™ is a low viscosity, non-toxic, thixotropic, pre-applied, water-based thread sealant for bulk processing applications (tumble or flow coat). When dried, it becomes a resilient, tight clinging, non-curing sealant for tapered or straight threads. The product provides excellent solvent resistance and an operating temperature range from -54°C to 150°C (-65°F to 300°F).

Product Advantages

  • Seals pipe threads for immediate use
  • Locks straight threads by resisting thread movement
  • Can be easily seen and inspected
  • Does not contaminate from shredding and washout
  • Provides lubrication for assembly
  • Seals against leakage of automotive lubricants, fuels and coolants under normal temperature
  • Dry and tack-free coating
  • Can be shipped on parts for field service
  • Ready for assembly, save application labor and mess on the line

Technical Data

Property Description
Color White
Application General sealing application/Low viscosity, ideal for plated or stainless parts
Temperature (℃) -54℃~150℃
Sealant after assembly Seals immediate after assembly
Sealing ability(psi) NPT : 120
Lubricity High
Shelf life 4 years at room temperature (8~28℃) 
**on 1/2” NPT

Industrial Specifications and Standards

Company Specification Company Specification
General Motors 9985473 Ford Motor WSL-M4G328-A2 L752A


LOCTITE® is the registered trademark of HENKEL Corporation.Dri-Loc® Vibra-Seal® Dri-Seal® are the registered trademark of HENKEL Corporation.


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