Loctite 577 Pipe & Thread Sealant Paste for Thread Sealing. 250 ml Tube, -55 → +150 °C

  • RS Stock No. 496-079
  • Mfr. Part No. LOCTITE® 577
  • Brand Loctite
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): IE
Product Details

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

Attribute Value
Application Thread Sealing
Colour Yellow
Strength Medium
Minimum Operating Temperature -55°C
Maximum Operating Temperature +150°C
Package Size 250 ml
Product Form Paste
Trade Name Loctite 577
Chemical Ingredients Methacrylate
Package Type Tube
Anaerobic Yes
Special Features Anaerobic
Operating Temperature Range -55 → +150 °C
124 In stock - FREE next working day delivery available
Price Each
£ 110.29
(exc. VAT)
£ 132.35
(inc. VAT)
Per unit
1 - 5
6 - 14
15 +
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