LOCTITE 4081
Harmonization Code : 3506.10.00.00 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg
Main features
- Very-Low-Viscosity Cyanoacrylate Adhesive
- Low-Odor Adhesive Cure
- Disposable Medical-Device Assembly
Product Description
LOCTITE® 4081™ is a one-component, very low-viscosity alkoxyethyl cyanoacrylate adhesive designed for ultra-fast bonding of metals, plastics and elastomers. The adhesive combines low odor and low blooming characteristics with rapid humidity-cure performance, making it especially suitable for applications where vapor control and appearance are critical. LOCTITE 4081 has been evaluated using ISO 10993-based biocompatibility protocols and is widely used in the assembly of disposable medical devices. Its excellent sterilization resistance, fast fixture speed and clean bonding performance make it ideal for medical and precision manufacturing environments.
Key Features & Benefits
- Very low-viscosity alkoxyethyl cyanoacrylate formulation.
- Low odor and low blooming properties.
- One-component adhesive requiring no mixing.
- Fast curing through ambient humidity exposure.
- Suitable for disposable medical device assembly.
- Tested according to ISO 10993-based biocompatibility protocols.
- Excellent performance after common sterilization processes.
Recommended Applications
- Disposable medical device manufacturing.
- Bonding metals, plastics and elastomers.
- Precision assemblies requiring low blooming.
- Applications requiring ultra-fast fixture speed.
- Medical and industrial production lines.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Cyanoacrylate | — | Alkoxyethyl cyanoacrylate adhesive |
| Chemical Type | Alkoxyethyl Cyanoacrylate | — | Low odor formulation |
| Appearance | Transparent, Colorless to Light Yellow Liquid | — | Uncured |
| Components | One Part | — | No mixing required |
| Specific Gravity | 1.05 | — | 25°C |
| Viscosity | 4 - 10 | mPa·s (cP) | Brookfield LVF, Spindle 1, 60 rpm, 25°C |
| Key Substrates | Metals, Plastics and Elastomers | — | Primary bonding materials |
| Cure Type | Humidity Cure | — | Atmospheric moisture activated |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Glass Transition Temperature (Tg) | 150 | °C | ASTM E228 |
| Coefficient of Thermal Expansion | 100 × 10⁻⁶ | K⁻¹ | ISO 11359-2 |
| Thermal Conductivity | 0.1 | W/m·K | ISO 8302 |
| Volume Resistivity | 10 × 10¹⁵ | Ω·cm | IEC 60093 |
| Surface Resistivity | 10 × 10¹⁵ | Ω | IEC 60093 |
| Dielectric Breakdown Strength | 25 | kV/mm | IEC 60243-1 |
| Lap Shear Strength (Steel, Grit Blasted) | 14 - 22 | N/mm² | ISO 4587, 24 h @ 22°C |
| Lap Shear Strength (Aluminum) | 9 - 15 | N/mm² | ISO 4587, Etched Aluminum |
| Tensile Strength (Steel) | 10 - 25 | N/mm² | ISO 6922, 24 h @ 22°C |
| Tensile Strength (Buna‑N) | ≥4.5 | N/mm² | ISO 6922, 10 s @ 22°C |
