LOCTITE 426
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Toughened Structural Bonding
- Impact-Resistant Cyanoacrylate Bonding
- Gel-Consistency Bonding Placement
Product Description
LOCTITE® 426 is a one-component, black ethyl cyanoacrylate adhesive gel toughened with elastomers to provide enhanced impact resistance, peel strength and durability. The adhesive is specifically formulated to improve resistance to heat and humidity while maintaining the rapid curing characteristics of cyanoacrylate technology. Designed for bonding metals, plastics and rubbers, LOCTITE 426 offers controlled application due to its gel consistency, making it suitable for vertical surfaces and applications requiring precise adhesive placement. The product cures through exposure to ambient humidity and develops strong structural bonds with excellent environmental resistance.
Key Features & Benefits
- Elastomer-toughened cyanoacrylate gel formulation.
- High impact and peel strength performance.
- Improved heat and humidity resistance.
- One-component adhesive requiring no mixing.
- Fast humidity-activated curing mechanism.
- Bonds metals, plastics and rubbers effectively.
- Gel consistency minimizes running and migration.
Recommended Applications
- Impact-resistant industrial assemblies.
- Metal, plastic and rubber bonding.
- Applications exposed to heat and humidity.
- Maintenance and repair operations.
- Vertical and controlled-placement bonding applications.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Cyanoacrylate | — | Elastomer-toughened ethyl cyanoacrylate gel |
| Chemical Type | Ethyl Cyanoacrylate | — | Impact-resistant adhesive |
| Appearance | Black Liquid Gel | — | Uncured |
| Components | One Part | — | No mixing required |
| Viscosity | 7,000 - 14,000 | mPa·s (cP) | Brookfield HBT, Spindle 3, 20 rpm, 25°C |
| Cure Mechanism | Humidity Cure | — | Activated by atmospheric moisture |
| Key Substrates | Metals, Plastics and Rubbers | — | General-purpose bonding |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Impact Resistance | Enhanced | — | Elastomer toughened formulation |
| Peel Strength | Enhanced | — | Improved peel performance |
| Heat Resistance | Improved | — | Compared with standard cyanoacrylates |
| Humidity Resistance | Improved | — | Enhanced environmental durability |
| Lap Shear Strength (Steel) | ≥16.5 | N/mm² | ISO 4587, 48 h Cure @ 22°C |
| Lap Shear Strength (Steel, Tested at 121°C) | ≥4.8 | N/mm² | After 24 h @ 22°C + 24 h @ 121°C |
| Lap Shear Strength (Steel After Heat Exposure) | ≥20.7 | N/mm² | Tested @ 22°C after 24 h @ 121°C |
| Cure Type | Moisture Activated | — | Cyanoacrylate polymerization |
