Loctite 577 Thread lock Paste for Thread Sealing 250 ml Tube

View all Pipe Sealants
Bulk discount available

Subtotal (1 unit)*

£125.54

(exc. VAT)

£150.65

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • 70 unit(s) ready to ship
  • Plus 14 unit(s) ready to ship from another location
  • Plus 120 unit(s) shipping from 27 October 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
1 - 5£125.54
6 - 14£120.52
15 +£118.02

*price indicative

RS Stock No.:
496-079
Mfr. Part No.:
LOCTITE® 577
Brand:
Loctite
Find similar products by selecting one or more attributes.
Select all

Brand

Loctite

Application

Thread Sealing

Colour

Yellow

Maximum Operating Temperature

+150°C

Strength

Medium

Minimum Operating Temperature

-55°C

Package Size

250 ml

Product Form

Paste

Trade Name

Loctite 577

Package Type

Tube

Operating Temperature Range

-55 → +150 °C

Special Features

Anaerobic

COO (Country of Origin):
IE

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

Applications


For medium strength applications
Suitable for sealing of pipe fittings and coarse threaded components
Thread sealing

Certifications


ANSI/ESD S20.20:2014
BS EN 61340-5-1:2007
DVGW approved

Related links