What materials is Loctite 561 suitable for?

It is designed for locking and sealing metal threaded joints and pipe fittings.

What is the advantage of the stick format?

The semi-solid formula does not drip or leak, making overhead and hard-to-reach applications clean and easy.

Can connections be disassembled after curing?

Yes, it is a low-strength sealant that allows for easy disassembly with standard hand tools.

What is the operating temperature range?

It withstands continuous service temperatures from -55 °C to +150 °C.

How does this sealant cure?

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

LOCTITE 561 thread sealant (19g stick) - 540920

Name: LOCTITE 561 thread sealant (19g stick) - 540920
Brand: LOCTITE
SKU: 02621394
Price: 18.2 EUR
Availability: InStock

Supplier number: LOCTITE 540920 | EAN 5010266383019

From 1 piece €18.20

From 15 pieces €17.29 - €13.65 saving

From 30 pieces €16.83 - €40.95 saving

From 45 pieces €16.38 - €81.90 saving

18.20 tax incl.

€15.04 excl. VAT (incl. all environmental contributions)

On stock - immediately available

blister

Ordered before 20:00 - delivered tomorrow 02/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

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How does it work?

For a purchase value of €99 to €125 excl. VAT, receive FREE LOCTITE 55 thread sealing cord 50 m (IDH 528244) worth €9.99.
For a purchase value of more than €125 excl. VAT, receive FREE LOCTITE SF 7850 hand cleaner 400 ml (IDH 2098250) worth €13.21.
The free item is automatically added to your order. No registration is required.
The promotion is valid from 01.10.2026 to 31.10.2026.
Loctite Buy & Get deals are recognisable by the promotion label on the product page. Click the label to view all available deals.

Clean thread sealing with Loctite 561

Practical benefits

Mess-free stick application: You apply the semi-solid formula cleanly directly to threads without drips, spills, or wasted product.
Instant low-pressure seal: You achieve rapid sealing on metal pipe threads without risk of creeping, shrinking, or blocking your piping systems.
Straightforward joint disassembly: Engineered with low disassembly strength, it allows you to remove and service threaded fittings easily using standard hand tools.

In a nutshell

The right choise for

With Loctite 561 thread sealant, you achieve fast and clean sealing on metal pipe threads and fittings. The convenient 19 g stick format eliminates drips, spills, and waste, making it ideal for overhead installations or field maintenance tasks. Its semi-solid formula cures anaerobically between close-fitting metal surfaces without creeping or shrinking, delivering an instant and dependable low-pressure seal. Operating reliably within a temperature range of -55 °C to +150 °C, it keeps connections leak-free. Thanks to its controlled low strength, you can disassemble fittings easily later on using standard hand tools.

Product information FAQ

€18.20

In stock - tax incl.

Key features according to our expert

Weight: 19 g
Principal hazard property: GHS07 Harmful or irritant
Packaging: Pen
Relative density: 1,14
ADR packing group: III
ADR class: 9
UN number: UN3077
P-statements: P273; P280; P333 + P313
H-statements: H317; H400; H410
Hazard class: GHS07 Harmful or irritant; GHS09 Environmental hazard
Physical state: Solid
Flash point: > 93 °C

Product description:

White, semi-solid methacrylate stick thread sealant, ideal toolbox product for all metal fittings that won't spill or leak.
NSF approved.
LOCTITE 561 is an white, semi-solid methacrylate thread sealant stick, an ideal toolbox product for maintenance and repair that won't spill or leak.
Fast, reliable curing on metal, tapered pipe threads and fittings with a thread size up to M80/R3"; its breakaway torque rating is 2Nm.
This is a low strength product for easy disassembly.
Service temperature is from -55 to +150ºC; NSF approved.

Precautionary statements

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.

Hazard statements

H317: May cause an allergic skin reaction.
H400: Very toxic to aquatic life.
H410: Very toxic to aquatic life with long lasting effects.

All Features

Weight: 19 g
Principal hazard property: GHS07 Harmful or irritant
Packaging: Pen
Relative density: 1,14
Adr packing group: III
Adr class: 9
Un number: UN3077
P-statements: P273; P280; P333 + P313
H-statements: H317; H400; H410
Hazard class: GHS07 Harmful or irritant; GHS09 Environmental hazard
Physical state: Solid
Flash point: > 93 °C

Brand LOCTITE
02621394
EAN 5010266383019
Supplier number LOCTITE 540920

Frequently asked questions about this product

Answered by specialists

What materials is Loctite 561 suitable for?: It is designed for locking and sealing metal threaded joints and pipe fittings.
What is the advantage of the stick format?: The semi-solid formula does not drip or leak, making overhead and hard-to-reach applications clean and easy.
Can connections be disassembled after curing?: Yes, it is a low-strength sealant that allows for easy disassembly with standard hand tools.
What is the operating temperature range?: It withstands continuous service temperatures from -55 °C to +150 °C.
How does this sealant cure?: It cures anaerobically in the absence of air between close-fitting metal surfaces.