What is Loctite 243 used for?

This threadlocker locks and seals metal bolts and nuts to prevent loosening caused by vibration and shock.

Can the assembly be disassembled later?

Yes, the medium-strength formula allows easy disassembly using standard hand tools.

Is it suitable for passive metals?

Yes, it works effectively on all metals, including stainless steel, aluminium, and plated surfaces.

Do threads need to be completely degreased?

No, Loctite 243 tolerates minor surface contaminations from cutting fluids and industrial oils.

What is the volume of this bottle?

This bottle contains 50 ml of liquid threadlocker.

LOCTITE 243 medium-strength threadlocker for general use (50 ml bottle) - 1335884

Name: LOCTITE 243 medium-strength threadlocker for general use (50 ml bottle) - 1335884
Brand: LOCTITE
SKU: 11010278
Price: 39.6 EUR
Availability: InStock

Supplier number: LOCTITE 1335884 | EAN 5010266000688

39.60 tax incl.

€32.73 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered tomorrow 07/11/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

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Reliable locking with Loctite 243

Practical benefits

Prevents loosening from vibration: You protect threaded fasteners against unintentional loosening caused by heavy vibration and repeated mechanical shocks.
Works on all metals: You apply it directly to active and passive metal surfaces without requiring any dedicated primer.
Removable with hand tools: Thanks to the medium strength formulation, you easily disassemble treated parts for routine machine maintenance.

In a nutshell

The right choise for

With Loctite 243 threadlocker, you reliably lock and seal metal bolts, nuts, and studs against loosening caused by heavy vibration, mechanical shock, and dynamic loads. Supplied in a 50 ml bottle, this liquid formula applies directly to all active and passive metal surfaces, including stainless steel and aluminium, without requiring a primer. It also cures effectively despite light surface contamination from cutting fluids or industrial oils. Thanks to its medium-strength formulation, you seal threads against fluid leaks and prevent galling, while still being able to disassemble treated components quickly and easily during routine maintenance using standard hand tools.

Product information FAQ

€39.60

In stock - tax incl.

Key features according to our expert

Net volume: 50 ml
P-statements: P101; P102; P273; P280; P333 + P313; P501
Relative density: 1,08
ADR packing group: Not applicable
ADR class: Not applicable
Principal hazard property: GHS07 Harmful or irritant
UN number: Not applicable
H-statements: H317; H412
Physical state: Liquid
Flash point: 100 - 200 °C
Packaging: Bottle
Hazard class: GHS07 Harmful or irritant
Strength (locking compound): Medium

Product description:

LOCTITE 243 - Threadlocker medium strength - Henkel
LOCTITE 243 is a general purpose threadlocker of medium bond strength.
This threadlocker secures and seal bolts, nuts and studs to prevent loosening due to vibration.
The product works on all metals, including passive substrates such as stainless steel, aluminium and plated surfaces.
It is proven to be tolerant of minor contamination due to industrial oils, e.g. engine oils, corrosion prevention oils and cutting fluids.

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: 50 ml
P-statements: P101; P102; P273; P280; P333 + P313; P501
Relative density: 1,08
Adr packing group: Not applicable
Adr class: Not applicable
Principal hazard property: GHS07 Harmful or irritant
Un number: Not applicable
H-statements: H317; H412
Physical state: Liquid
Flash point: 100 - 200 °C
Packaging: Bottle
Hazard class: GHS07 Harmful or irritant
Strength (locking compound): Medium

Brand LOCTITE
11010278
EAN 5010266000688
Supplier number LOCTITE 1335884

Frequently asked questions about this product

Answered by specialists

What is Loctite 243 used for?: This threadlocker locks and seals metal bolts and nuts to prevent loosening caused by vibration and shock.
Can the assembly be disassembled later?: Yes, the medium-strength formula allows easy disassembly using standard hand tools.
Is it suitable for passive metals?: Yes, it works effectively on all metals, including stainless steel, aluminium, and plated surfaces.
Do threads need to be completely degreased?: No, Loctite 243 tolerates minor surface contaminations from cutting fluids and industrial oils.
What is the volume of this bottle?: This bottle contains 50 ml of liquid threadlocker.