What is Loctite 420 best used for?

This liquid cyanoacrylate adhesive is designed for bonding close-fitting parts and narrow gaps up to 0.05 mm.

Which materials can be bonded with this instant adhesive?

It bonds metals, rubbers, and plastics. Difficult-to-bond plastics such as PE or PP require a suitable primer.

What does the capillary action provide?

Thanks to its very low viscosity, the adhesive wicks directly into fine joints and gaps between pre-assembled parts.

How fast does the adhesive fixture?

Fixture time is reached within 5 to 20 seconds, curing via atmospheric moisture.

What are the optimal storage conditions?

Store unopened containers in a dry place between 2 °C and 8 °C to preserve performance.

LOCTITE 420 instant glue (20g) - 1921840

Name: LOCTITE 420 instant glue (20g) - 1921840
Brand: LOCTITE
SKU: 11010047
Price: 28.6 EUR
Availability: InStock

Supplier number: LOCTITE 1921840 | EAN 5010266008066

From 1 piece €28.60

From 12 pieces €27.17 - €17.16 saving

From 24 pieces €26.45 - €51.48 saving

From 36 pieces €25.74 - €102.96 saving

28.60 tax incl.

€23.64 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered as of 17/11/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

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Precise bonding with Loctite 420

Practical benefits

Strong capillary wicking: With its very low viscosity, the adhesive easily penetrates close-fitting joints and pre-assembled components.
Fast fixture time: You achieve a reliable hold within 5 to 20 seconds, helping you keep assembly workflows moving quickly.
Broad multi-material compatibility: You can securely bond a wide range of materials including metals, rubbers, and plastics.

In a nutshell

The right choise for

With Loctite 420 instant adhesive, you can easily secure close-fitting components and pre-assembled parts. Thanks to its very low viscosity, this liquid cyanoacrylate wicks directly into narrow gaps up to 0.05 mm via capillary action, eliminating the need for prior disassembly. You achieve reliable fixture strength within 5 to 20 seconds, keeping your assembly and repair work moving without delay. Suitable for bonding metals, rubbers, and plastics, this 20 g bottle delivers the speed and control you need for precise results.

Product information FAQ

€28.60

In stock - tax incl.

Key features according to our expert

Relative density: 1,04
ADR packing group: Not applicable
ADR class: Not applicable
Weight: 20 g
Principal hazard property: GHS07 Harmful or irritant
UN number: Not applicable
P-statements: P261; P280; P305 + P351 + P338; P337 + P313; P501
H-statements: H315; H319; H335
Hazard class: GHS07 Harmful or irritant
Physical state: Liquid
Flash point: 80 - 93 °C
Packaging: Bottle

Product Description:

LOCTITE 420 is a transparent, colorless, general purpose, capillary, ethyl-based instant adhesive. Suitable for metals, rubbers and plastic, it is also suitable for polyolefins in combination with Primer LOCTITE SF 770 or LOCTITE SF 7239. It has a fixture time of 5 - 20 secs.

Benefits:

Cures very quickly when confined between two surfaces
Ideal for bonding small to medium-size parts
Excellent adhesion to most substrates
Suitable for metals, rubbers and plastics
Fixture time of 5 - 20 secs.
Solvent-free
Capillary action

Precautionary statements

P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P337 + P313: If eye irritation persists: Get medical advice/attention.
P501: Dispose of contents/container to ... (see safety data sheet).

Hazard statements

H315: Causes skin irritation.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.

All Features

Relative density: 1,04
Adr packing group: Not applicable
Adr class: Not applicable
Weight: 20 g
Principal hazard property: GHS07 Harmful or irritant
Un number: Not applicable
P-statements: P261; P280; P305 + P351 + P338; P337 + P313; P501
H-statements: H315; H319; H335
Hazard class: GHS07 Harmful or irritant
Physical state: Liquid
Flash point: 80 - 93 °C
Packaging: Bottle

Brand LOCTITE
11010047
EAN 5010266008066
Supplier number LOCTITE 1921840

Frequently asked questions about this product

Answered by specialists

What is Loctite 420 best used for?: This liquid cyanoacrylate adhesive is designed for bonding close-fitting parts and narrow gaps up to 0.05 mm.
Which materials can be bonded with this instant adhesive?: It bonds metals, rubbers, and plastics. Difficult-to-bond plastics such as PE or PP require a suitable primer.
What does the capillary action provide?: Thanks to its very low viscosity, the adhesive wicks directly into fine joints and gaps between pre-assembled parts.
How fast does the adhesive fixture?: Fixture time is reached within 5 to 20 seconds, curing via atmospheric moisture.
What are the optimal storage conditions?: Store unopened containers in a dry place between 2 °C and 8 °C to preserve performance.