Which materials are suitable for this 2K epoxy adhesive?

Loctite EA 3421 bonds securely to metals, ceramics, wood, glass, and rigid plastics.

What is the benefit of the longer working time?

The slow cure gives you ample time to align parts precisely and assemble large surface areas.

How do you apply this dual cartridge?

Dispense the adhesive using a compatible 50 ml manual dispenser and a static mixing nozzle for a 1:1 ratio.

Is this epoxy adhesive moisture resistant?

Yes, once fully cured, this structural adhesive provides excellent resistance to moisture and chemicals.

How long does it take to reach handling strength?

At room temperature (22 °C), the adhesive reaches its fixture time after 240 minutes.

LOCTITE hysol 3421 2K epoxy glue (50 ml twin duo tube) - 2063256

Name: LOCTITE hysol 3421 2K epoxy glue (50 ml twin duo tube) - 2063256
Brand: LOCTITE
SKU: 11010387
Price: 25.95 EUR
Availability: PreOrder

Supplier number: LOCTITE 2063256 | EAN 5010266331058

Recommended Retail Price €32.90

25.95 tax incl.

€21.45 excl. VAT (incl. all environmental contributions)

On order: delivered from 24/10/2026

The minimum purchase order quantity for the product is 10.

Ordered before 20:00 - delivered as of 24/10/2026
Free shipping
Delivery by DHL

✆ Talk to a specialist

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.

High-strength structural bonding for various substrates

Practical benefits

Proven Loctite EA 3421 formulation: You achieve exceptional bond strength across metals, ceramics, wood, glass, and rigid plastics.
Extra time for adjustment: The slow curing profile and extended working life allow you to reposition larger components precisely before setting.
Superior moisture resistance: This gap-filling epoxy formula withstands water exposure to ensure your heavy-duty bonds remain secure over time.

In a nutshell

The right choise for

With Loctite ea 3421, you tackle demanding structural bonding jobs with complete confidence. This universal 2K epoxy adhesive in a convenient 50 ml dual cartridge delivers high-strength bonds on metals, ceramics, wood, glass, and rigid plastics. Thanks to its slow cure profile and extended working time, you have ample opportunity to reposition and align large components precisely after assembly. The gap-filling formula easily compensates for uneven or poorly mating surfaces and provides superior moisture resistance to ensure strong, long-lasting results in any working environment.

Product information Accessories FAQ

€25.95

tax incl.

Key features according to our expert

Net volume: 50 ml
ADR packing group: II; III
ADR class: 8; 9
Principal hazard property: GHS05 Corrosive
UN number: UN2735; UN3082
P-statements: P273; P280; P303 + P361 + P353; P305 + P351 + P338; P310; P302 + P352; P333 + P313; P337 + P313
H-statements: H314; H317; H318; H400; H410; H315; H319; H411
Hazard class: GHS05 Corrosive; GHS07 Harmful or irritant; GHS09 Environmental hazard
Physical state: Liquid
Flash point: 100 °C

Product Description:

LOCTITE EA 3421 is a 2-part, clear amber, general purpose epoxy adhesive which cures slowly at room temperature after mixing. It develops high strength and excellent moisture resistance. The gap filling properties make this adhesive system suitable for rough or poorly fitting surfaces made from metal, ceramic, wood or rigid plastics. The long working life and medium viscosity make this adhesive system suitable for large surfaces and where adjustment time is needed after assembly. Applications include bonding aluminum window frames and GRP panels.

Benefits:

General purpose
High strength and excellent moisture resistance after curing
Long working life
Applications include bonding aluminum window frames and GRP panels

Precautionary statements

P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P303 + P361 + P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water (or shower).
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P310: Immediately call a POISON CENTER/doctor/…
P302 + P352: IF ON SKIN: Wash with plenty of water/…
P333 + P313: If skin irritation or rash occurs: Get medical advice/attention.
P337 + P313: If eye irritation persists: Get medical advice/attention.

Hazard statements

H314: Causes severe skin burns and eye damage.
H317: May cause an allergic skin reaction.
H318: Causes serious eye damage.
H400: Very toxic to aquatic life.
H410: Very toxic to aquatic life with long lasting effects.
H315: Causes skin irritation.
H319: Causes serious eye irritation.
H411: Toxic to aquatic life with long lasting effects.

All Features

Net volume: 50 ml
Adr packing group: II; III
Adr class: 8; 9
Principal hazard property: GHS05 Corrosive
Un number: UN2735; UN3082
P-statements: P273; P280; P303 + P361 + P353; P305 + P351 + P338; P310; P302 + P352; P333 + P313; P337 + P313
H-statements: H314; H317; H318; H400; H410; H315; H319; H411
Hazard class: GHS05 Corrosive; GHS07 Harmful or irritant; GHS09 Environmental hazard
Physical state: Liquid
Flash point: 100 °C

Brand LOCTITE
11010387
EAN 5010266331058
Supplier number LOCTITE 2063256

Accessories

LOCTITE 96001 handgun for 50 ml duo tubes (10:1/1:1/2:1) - 267452

72.40

€59.83 excl. VAT

On stock, immediately available.

Frequently asked questions about this product

Answered by specialists

Which materials are suitable for this 2K epoxy adhesive?: Loctite EA 3421 bonds securely to metals, ceramics, wood, glass, and rigid plastics.
What is the benefit of the longer working time?: The slow cure gives you ample time to align parts precisely and assemble large surface areas.
How do you apply this dual cartridge?: Dispense the adhesive using a compatible 50 ml manual dispenser and a static mixing nozzle for a 1:1 ratio.
Is this epoxy adhesive moisture resistant?: Yes, once fully cured, this structural adhesive provides excellent resistance to moisture and chemicals.
How long does it take to reach handling strength?: At room temperature (22 °C), the adhesive reaches its fixture time after 240 minutes.