LOCTITE 4203
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- Elastomer-Toughened Heat-Resistant Bonds
- Fast Multi-Substrate Fixturing
- Impact and Peel Resistance
Product Description
LOCTITE 4203 is a one-part, low-viscosity ethyl cyanoacrylate instant adhesive toughened with elastomers for bonds exposed to heat, humidity, flexing, or impact. Atmospheric moisture initiates cure, and typical fixture times range from 10 to 20 seconds on steel, aluminum, ABS, NBR, and G-10 epoxy under the stated conditions. The material's 150 to 600 mPa s viscosity matches thin 0.05 mm bond gaps. Grit-blasted steel lap shear reaches 21.2 to 21.7 N/mm^2 after a 24-hour, 22 deg C cure. Applications include bonding rubbers, plastics, and metals where heat resistance is required.
Key features
- Elastomer-Toughened Bonds: The formulation adds flexibility plus impact, heat, and humidity resistance.
- Fast 10 to 20 Second Fixture: Steel, aluminum, ABS, NBR, and G-10 epoxy fixture in 10 to 20 seconds.
- Thin-Gap Instant Bonding: Viscosity is 150 to 600 mPa s for 0.05 mm bond gaps.
Applications
Applications include bonding rubbers, plastics, and metals where heat resistance is required.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Other Properties
Additional Information
As-Supplied Properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Colorless to slightly pale yellow liquid | - | Uncured |
| Specific gravity | 1.1 | - | 25 deg C |
| Viscosity | 150 to 600 | mPa s | Brookfield RVT, spindle 5, 20 rpm, 25 deg C |
| Viscosity | 150 to 600 | mPa s | Cone and plate, shear rate 100 s^-1, 25 deg C |
Final-State Properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Lap shear strength | 21.2 to 21.7 | N/mm^2 | Grit-blasted steel; cured 24 h at 22 deg C |
| Lap shear strength | 13.7 to 14.2 | N/mm^2 | Aluminum; cured 24 h at 22 deg C |
| Block shear strength | 5.4 to 5.8 | N/mm^2 | ISO 13445; ABS; cured 24 h at 22 deg C |
| Side impact resistance | >=4.5 | J | Aluminum, isopropanol wiped; cured 24 h at 22 deg C |
| Lap shear strength | >=5.6 | N/mm^2 | Grit-blasted steel; cured 24 h at 22 deg C, then 24 h at 121 deg C; tested at 121 deg C |
| 180 degree peel strength | 3.5 | N/mm | ISO 8510-2; grit-blasted steel; cured 48 h at 22 deg C |
