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Loctite 577 Sealant

Loctite Sealant Paste For Thread Sealing

The Loctite yellow 250ml gasket sealant paste is a general-purpose thread sealant for straight/straight and straight/taper threads and fittings. It fills the space between threaded parts and seals and locks at the same time. This paste is composed of methacrylate and has an excellent chemical and thermal resistance. It is designed for the locking and sealing of metal pipes and fittings as well as other threaded assemblies. This product provides an instant, low-pressure seal for metal pipes and fittings. It will not creep, shrink or shred. The product offers less migration of liquid product after application.

Features and Benefits

When fully cured, the sealant can withstand pressure more than 200bar

Chemical ingredient present is methacrylate
Medium strength
Chemical ingredient present is methacrylate
Higher-strength on contaminated surfaces
High viscosity, thixotropic
Improved thermal performance
Offers gap performance to 0.25 mm
Operating temperature ranges between -55°C and 150°C
high-performance on passive metals without an activator
Easy to apply


For medium strength applications

Suitable for sealing of pipe fittings and coarse threaded components
Thread sealing


ANSI/ESD S20.20:2014

BS EN 61340-5-1:2007
DVGW approved

Technical Data Sheet

Part NumberProduct DescriptionStockPrice
Loctite 577Loctite 577 Sealant (50ml)

5 in stock