Which materials is Loctite 577 suitable for?

It is designed for threaded metal connections. It works on active metals like brass and copper, as well as passive metals like stainless steel. Not recommended for plastics.

How does this pipe sealant cure?

The sealant cures anaerobically. It hardens in the absence of air between close-fitting metal surfaces.

Can connections sealed with Loctite 577 be disassembled?

Yes, its medium-strength formulation allows for disassembly using standard hand tools.

How should Loctite 577 be applied?

Clean the threads and apply a continuous 360° bead to the leading threads of the male fitting before tightening with tools.

Does the product drip during application?

No, its thixotropic paste consistency prevents running and dripping on vertical threads.

LOCTITE 577 thread sealant (250 ml tottle) - 2068187

Name: LOCTITE 577 thread sealant (250 ml tottle) - 2068187
Brand: LOCTITE
SKU: 11010080
Price: 104.8 EUR
Availability: InStock

Supplier number: LOCTITE 2068187 | EAN 5010266011943

Recommended Retail Price €144.98

104.80 tax incl.

€86.61 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered as of 09/11/2026
Shipping costs €6.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

✆ Talk to a specialist

Reliable sealing for threaded connections

Practical benefits

Immediate low-pressure joint sealing: You achieve an instant seal on metal pipes and fittings, preventing fluid leaks directly after completing the assembly.
Loctite locks against vibration: By filling the space between threads, you protect the assembly from loosening caused by mechanical vibration or shock.
High chemical fluid resistance: You benefit from excellent thermal stability, ensuring the compound will not shrink, creep, or tear under harsh operating conditions.

In a nutshell

The right choise for

With Loctite 577 pipe sealant, you instantly create a reliable seal on metal pipes and threaded fittings to prevent fluid and gas leaks. Thanks to its thixotropic paste consistency, the sealant stays cleanly in place during application without running or dripping. By completely filling the space between threads, it locks assemblies securely against loosening from shock and mechanical vibration. The anaerobic formula delivers excellent thermal and chemical resistance on both active and passive metals, ensuring the seal will not shrink or tear under demanding conditions. With its medium-strength formulation, you can easily disassemble connections using standard hand tools for straightforward maintenance.

Product information FAQ

€104.80

In stock - tax incl.

Key features according to our expert

Net volume: 250 ml
Relative density: 1,15
ADR packing group: Not applicable
ADR class: Not applicable
Principal hazard property: GHS07 Harmful or irritant
UN number: Not applicable
P-statements: P101; P102; P273; P280; P333 + P313; P501
H-statements: H317; H412
Hazard class: GHS07 Harmful or irritant
Physical state: Liquid
Flash point: > 100 °C
Packaging: Tube

Product description:

Medium-strength, general purpose thread sealant for straight/straight and straight/taper threads and fittings.
Fills the space between threaded parts and seals and locks at the same time.
LOCTITE 577 is designed for the locking and sealing of metal pipes and fittings as well as other threaded assemblies.
The product provides an instant, low-pressure seal for metal pipes and fittings.
It will not creep, shrink or shred.
It has excellent chemical and thermal resistance and offers less migration of liquid product after application.
NEW: Henkel has recently improved the product formulation of LOCTITE 577 providing: Higher strength on contaminated surfaces Improved thermal performance High performance on passive metals without an activator

Precautionary statements

P101: If medical advice is needed, have product container or label at hand.
P102: Keep out of reach of children.
P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P333 + P313: If skin irritation or rash occurs: Get medical advice/attention.
P501: Dispose of contents/container to ... (see safety data sheet).

Hazard statements

H317: May cause an allergic skin reaction.
H412: Harmful to aquatic life with long lasting effects.

All Features

Net volume: 250 ml
Relative density: 1,15
Adr packing group: Not applicable
Adr class: Not applicable
Principal hazard property: GHS07 Harmful or irritant
Un number: Not applicable
P-statements: P101; P102; P273; P280; P333 + P313; P501
H-statements: H317; H412
Hazard class: GHS07 Harmful or irritant
Physical state: Liquid
Flash point: > 100 °C
Packaging: Tube

Brand LOCTITE
11010080
EAN 5010266011943
Supplier number LOCTITE 2068187

Frequently asked questions about this product

Answered by specialists

Which materials is Loctite 577 suitable for?: It is designed for threaded metal connections. It works on active metals like brass and copper, as well as passive metals like stainless steel. Not recommended for plastics.
How does this pipe sealant cure?: The sealant cures anaerobically. It hardens in the absence of air between close-fitting metal surfaces.
Can connections sealed with Loctite 577 be disassembled?: Yes, its medium-strength formulation allows for disassembly using standard hand tools.
How should Loctite 577 be applied?: Clean the threads and apply a continuous 360° bead to the leading threads of the male fitting before tightening with tools.
Does the product drip during application?: No, its thixotropic paste consistency prevents running and dripping on vertical threads.