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






anthony99 –
Exactly as described. Better than I thought; I’m satisfied. Perfect from start to finish. Perfectly as described.
Tristan S. –
Top seller. Perfect job, thanks. Arrived on time and in excellent condition. Well packaged and delivered quickly.
Antonia –
Packaging slightly damaged, but the product is excellent. Packaging was slightly damaged, but product is excellent. A friend recommended it and I’m so glad I ordered. Very effective, I noticed a change in just a week.
Audrey L. –
No unpleasant smell, which I really appreciate. Very effective; noticed a change after just one week.
riccardo_it –
Arrived without any defect. Excellent packaging.
Nicole –
Not too big, not too small, just perfect. I’ve been using it for 2 weeks and I already see results! Easy to use, without making a mess. The quality pleasantly surprised me.
Angela X. –
I was skeptical, but now I order regularly.
Giuseppe L. –
Well packaged and delivered quickly. Everything perfect, thank you. Very satisfied with the purchase.