What is Loctite 640 used for?

You use it for retaining cylindrical parts such as bearings, bushings, keys, and splines onto shafts or into housings.

What is the benefit of the slow curing time?

The extended fixture time gives you extra time to accurately align components, especially for large-diameter parts.

What is the maximum diametral clearance?

The maximum diametral clearance is 0.1 mm.

What is the operating temperature range?

Once fully cured, the product withstands temperatures ranging from -55 °C to +175 °C.

How does this retaining compound cure?

It is an anaerobic compound that cures in the absence of air between close-fitting metal surfaces.

LOCTITE 640 fixing adhesive (50 ml bottle) - 88578

Name: LOCTITE 640 fixing adhesive (50 ml bottle) - 88578
Brand: LOCTITE
SKU: 11010087
Price: 65.95 EUR
Availability: PreOrder

Supplier number: LOCTITE 88578 | EAN 5010266640334

From 1 piece €65.95

From 12 pieces €62.65 - €39.57 saving

From 24 pieces €61.00 - €118.71 saving

From 36 pieces €59.35 - €237.42 saving

65.95 tax incl.

€54.50 excl. VAT (incl. all environmental contributions)

On order: delivered from 11/11/2026

Delivery by DHL

✆ Talk to a specialist

High-strength bonding for cylindrical assemblies

Practical benefits

Extended time for alignment: The slow cure allows you to accurately position and align large or complex components before fixturing.
Reliable vibration-proof retention: You achieve maximum joint strength with Loctite to eliminate backlash and prevent loosening from shock.
Broad temperature tolerance: It performs reliably in demanding environments with an operating range from -55 °C to +175 °C.

In a nutshell

The right choise for

With Loctite 640 retaining compound, you secure and retain cylindrical assemblies with absolute precision. The slow curing speed gives you the necessary time to accurately align and position complex or large-diameter components such as bearings, bushings, and splines before fixturing. Its anaerobic formula fills diametral clearances up to 0.1 mm, eliminating backlash and preventing parts from loosening under severe vibration or shock. Operating reliably between -55 °C and +175 °C, this 50 ml bottle delivers a high-strength, durable bond for demanding mechanical assemblies.

Product information FAQ

€65.95

tax incl.

Key features according to our expert

Net volume: 50 ml
Relative density: 1,05
ADR packing group: Not applicable
ADR class: Not applicable
Principal hazard property: GHS05 Corrosive
UN number: Not applicable
P-statements: P101; P102; P261; P273; P280; P302 + P352; P305 + P351 + P338; P333 + P313; P501
H-statements: H315; H317; H318; H335; H412
Hazard class: GHS05 Corrosive; GHS07 Harmful or irritant
Physical state: Liquid
Flash point: > 100 °C
Packaging: Bottle

Product description:

LOCTITE 640 - methacrylate slow cure retaining compound - Henkel
LOCTITE 640 is a green, anaerobic, low viscosity, methacrylate ester-based retaining compound ideal for parts requiring a longer positioning time.
Fixturing time on steel is 2 h.
Also used for active metals such as brass.
This is a high strength product with good temperature resistance.
Max. diametrical clearance is 0.1 mm and service temperature is -55 to +175ºC.
Fluorescence allows product presence to be monitored.

Precautionary statements

P101: If medical advice is needed, have product container or label at hand.
P102: Keep out of reach of children.
P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P302 + P352: IF ON SKIN: Wash with plenty of water/…
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P333 + P313: If skin irritation or rash occurs: Get medical advice/attention.
P501: Dispose of contents/container to ... (see safety data sheet).

Hazard statements

H315: Causes skin irritation.
H317: May cause an allergic skin reaction.
H318: Causes serious eye damage.
H335: May cause respiratory irritation.
H412: Harmful to aquatic life with long lasting effects.

All Features

Net volume: 50 ml
Relative density: 1,05
Adr packing group: Not applicable
Adr class: Not applicable
Principal hazard property: GHS05 Corrosive
Un number: Not applicable
P-statements: P101; P102; P261; P273; P280; P302 + P352; P305 + P351 + P338; P333 + P313; P501
H-statements: H315; H317; H318; H335; H412
Hazard class: GHS05 Corrosive; GHS07 Harmful or irritant
Physical state: Liquid
Flash point: > 100 °C
Packaging: Bottle

Brand LOCTITE
11010087
EAN 5010266640334
Supplier number LOCTITE 88578

Frequently asked questions about this product

Answered by specialists

What is Loctite 640 used for?: You use it for retaining cylindrical parts such as bearings, bushings, keys, and splines onto shafts or into housings.
What is the benefit of the slow curing time?: The extended fixture time gives you extra time to accurately align components, especially for large-diameter parts.
What is the maximum diametral clearance?: The maximum diametral clearance is 0.1 mm.
What is the operating temperature range?: Once fully cured, the product withstands temperatures ranging from -55 °C to +175 °C.
How does this retaining compound cure?: It is an anaerobic compound that cures in the absence of air between close-fitting metal surfaces.