LOCTITE 498
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- General-Purpose Cyanoacrylate Adhesive
- Cured Thermal-Cycling Resistance
- Cured Humidity Resistance
Product Description
LOCTITE® 498™ is a one-component, medium-viscosity ethyl cyanoacrylate adhesive designed for general-purpose bonding applications requiring elevated temperature resistance and excellent humidity durability. The adhesive rapidly bonds metals, plastics and elastomers through moisture curing and is formulated to withstand thermal cycling while maintaining reliable bond strength. Its combination of fast fixture speed, high glass transition temperature and good environmental resistance makes it suitable for demanding industrial assembly applications where long-term performance under heat exposure is required.
- General-purpose cyanoacrylate adhesive with enhanced heat resistance.
- Excellent resistance to thermal cycling.
- Superior humidity resistance compared with standard formulations.
- Rapid humidity-cure technology.
- One-component system requiring no mixing.
- Bonds rubbers, plastics and metals.
- Suitable for applications requiring elevated-temperature performance.
Recommended Applications
- General industrial bonding operations.
- Assemblies exposed to heat and thermal cycling.
- Bonding metals, rubbers and engineering plastics.
- Applications requiring humidity resistance.
- Precision assembly with close-fitting bond lines.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
AppearanceAppearance
Transparent, colorless to pale yellow liquidSpecific GravitySpecific Gravity
1.1Physical Properties
ViscosityViscosity
400 - 600 mPa.sThermal Properties
Glass Transition Temperature (Tg)Glass Transition Temperature (Tg)
120 °CThermal ConductivityThermal Conductivity
0.1 W/m.KElectrical Properties
Volume ResistivityVolume Resistivity
10e+15 Ohms⋅cmAdditional Information
Technical Properties
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Cyanoacrylate | — | Heat-resistant instant adhesive |
| Chemical Type | Ethyl Cyanoacrylate | — | One-component formulation |
| Appearance | Transparent, Colorless to Pale Yellow Liquid | — | Uncured material |
| Components | One Part | — | No mixing required |
| Specific Gravity | 1.10 | — | 25°C |
| Viscosity | 400 - 600 | mPa·s (cP) | Brookfield LVF, Spindle 2, 30 rpm, 25°C |
| Key Substrates | Rubbers, Plastics, Metals | — | Recommended bonding materials |
| Cure Mechanism | Humidity Cure | — | Atmospheric moisture activated |
Technical Properties
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Glass Transition Temperature (Tg) | 120 | °C | ASTM E228 |
| Coefficient of Thermal Expansion | 80 × 10⁻⁶ | K⁻¹ | ISO 11359-2 |
| Thermal Conductivity | 0.10 | W/(m·K) | ISO 8302 |
| Volume Resistivity | 10 × 10¹⁵ | Ω·cm | IEC 60093 |
| Dielectric Breakdown Strength | 25 | kV/mm | IEC 60243-1 |
| Dielectric Constant / Dissipation Factor | 2.3 / <0.02 | — | 0.05 kHz to 1,000 kHz |
| Lap Shear Strength (Steel) | 19 | N/mm² | ISO 4587, 24 h cure at 22°C |
| Lap Shear Strength (Polycarbonate) | 10 | N/mm² | ISO 4587, 24 h cure |
| Lap Shear Strength (Phenolic) | 10 | N/mm² | ISO 4587, 24 h cure |
| Heat-Aged Lap Shear Strength (Steel) | ≥6.9 | N/mm² | After 24 h cure + 24 h at 121°C, tested at 121°C |
| Initial Lap Shear Strength (Steel) | ≥4.8 |
