Description
Loctite EA 3421 2-part, high-strength, medium-viscosity structural adhesive for various substrates
LOCTITE® EA 3421 is a clear amber (after mixing), high-strength epoxy adhesive system for metals, ceramics, wood, glass or rigid plastics. It offers good gap-filling properties, making it highly suitable for rough or poorly fitting surfaces. Its medium-viscosity nature and long working life make it ideal for large surfaces where adjustments are needed after assembly.
- Content: 200 ml double cartridge (Manufacturer number: 2063258)
Application
- It’s typically used for bonding aluminum window frames and GRP panels.
- LOCTITE EA 3421 cures at room temperature and provides excellent moisture resistance.
Characteristics
- Slow curing for reworkability
- High strength
- Medium viscosity
- Resistant to moisture
Technical Information
| Fixture Time | 240.0 min |
| Mix Ratio, by Volume | 1 : 1 |
| Mix ratio, by weight | 100 : 90 |
| Mixed | |
| Color, Mixed | Light amber |
| Resin | |
| Color, Resin | White |
| Viscosity, Brookfield – RVT, Resin @ 25.0 °C Spindle 6, speed 2.5 rpm | 30000.0 – 90000.0 mPa·s (cP) |
| Viscosity, Brookfield – RVT, Resin @ 25.0 °C Spindle 6, speed 5 rpm | 60000.0 – 100000.0 mPa·s (cP) , 9000.0 – 19000.0 mPa·s (cP) |
| Hardener | |
| Color, Hardener | Amber |
| Viscosity, Brookfield – RVT, Hardener @ 25.0 °C Spindle 6, speed 10 rpm | 11000.0 – 19000.0 mPa·s (cP) |
Loctite EA3421, Loctite EA-3421
Hazard Information (CLP) – LOCTITE EA 3421 A

Signal word: Warning
Hazard statements (H-phrases)
- H315 Causes skin irritation.
- H317 May cause an allergic skin reaction.
- H319 Causes serious eye irritation.
- H411 Toxic to aquatic life with long-lasting effects.
Precautionary statements (P-phrases)
Prevention:
- P273 Avoid release to the environment.
- P280 Wear protective gloves.
Response:
- P302+P352 IF ON SKIN: Wash with plenty of water and soap.
- P333+P313 If skin irritation or rash occurs: Get medical advice/attention.
- P337+P313 If eye irritation persists: Get medical advice/attention.
Hazard Statements (CLP) – LOCTITE EA 3421 B

Signal word: Danger.
Hazard Statements (H-phrases)
- H314 Causes severe skin burns and eye damage.
- H317 May cause an allergic skin reaction.
- H410 Very toxic to aquatic life with long-lasting effects.
Precautionary Statements (P-phrases)
Prevention:
- P273 Avoid release to the environment.
- P280 Wear protective gloves/protective clothing/eye protection/face protection.
Response:
- 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.
Henkel AG & Co. KGaA, Henkelstr. 67, 40589 Düsseldorf, GERMANY, +49 211 7970, [email protected], www.henkel.com






Isaac S. –
Super practical. Great value for money. Simple to install. Super value for the money.
Benedikt –
Fast and reliable. Fast shipping, perfect product. Fast shipping, great service. Product as expected.
madison88 –
Easy to use, without making a mess. Perfect for my needs; I’m very satisfied. Better than anything I’ve tried before.
amelie.s –
Very satisfied, better than expected. Surprisingly good quality for the price. Super fast delivery, thank you. Looks even nicer in real life.
matteo_s –
Great customer support.
Diego F. –
Highly recommended. Arrived as promised. Worth every cent.
sophia88 –
Perfect for my needs, couldn’t be happier. Pleasant to use at home.
jakob_s –
Great customer support. Top product, top price. Well made and durable. Very functional.
antoine75 –
Highly recommended. Fast shipping, perfect product.
filippo88 –
Well packaged and delivered quickly. Everything in perfect condition.