LOCTITE 4861
Harmonization Code : 3506.91.90.99 | 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 ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- Flexible Cured Adhesive
- Rapid Humidity Cure
- Medium-Viscosity Application Control
Product Description
LOCTITE® 4861™ is a one-component ethyl/butyl cyanoacrylate adhesive specifically formulated to create flexible bond lines while maintaining rapid curing performance. The medium-viscosity adhesive is designed for bonding difficult-to-bond materials including metals, plastics and elastomers, and is especially effective when joining rubber components where joint compressibility must be maintained. It also performs well on porous and absorbent substrates such as paper, leather and fabrics. LOCTITE 4861 has been evaluated to Henkel test protocols based on ISO 10993 biocompatibility standards and is suitable for use in disposable medical device assembly applications.
Key Features & Benefits
- Flexible bond-line formulation for improved joint performance.
- Rapid humidity-cure cyanoacrylate technology.
- Maintains compressibility in bonded rubber assemblies.
- Suitable for metals, plastics, elastomers and porous materials.
- Medium viscosity for controlled application.
- One-component formulation requiring no mixing.
- Evaluated to ISO 10993-based biocompatibility protocols for medical device use.
Recommended Applications
- Disposable medical device assembly.
- Rubber-to-metal and rubber-to-plastic bonding.
- Flexible bonding applications requiring shock absorption.
- Bonding paper, leather and fabric materials.
- General industrial assembly of metals, plastics and elastomers.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Electrical Properties
Additional Information
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Cyanoacrylate | — | Flexible instant adhesive |
| Chemical Type | Ethyl / Butyl Cyanoacrylate | — | Flexible bonding formulation |
| Appearance | Clear Colorless Liquid | — | Uncured |
| Components | One Part | — | No mixing required |
| Specific Gravity | 1.05 | — | 25°C |
| Viscosity | 3,000 - 5,500 | mPa·s (cP) | Cone & Plate, 25°C, 50 s⁻¹ |
| Key Substrates | Steel, Polycarbonate, ABS | — | Typical bonding materials |
| Cure Mechanism | Humidity Cure | — | Atmospheric moisture activated |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Glass Transition Temperature (Tg) | 60 | °C | ASTM E228 |
| Coefficient of Thermal Expansion | 100 × 10⁻⁶ | K⁻¹ | ISO 11359-2 |
| Shore Hardness | 80 - 90 | Shore A | ISO 868 |
| Tensile Modulus | 280 - 580 | N/mm² | ISO 527-3 |
| Volume Resistivity | 158 × 10¹² | Ω·cm | IEC 60093 |
| Surface Resistivity | >1 × 10¹⁵ | Ω | IEC 60093 |
| Lap Shear Strength (Steel) | 11 - 17 | N/mm² | ISO 4587, 7 days cure |
| Lap Shear Strength (Aluminum) | 8 - 12 | N/mm² | ISO 4587, grit blasted |
| Lap Shear Strength (ABS) | 5 - 9 | N/mm² | ISO 4587 |
| Lap Shear Strength (Polycarbonate) | 6 - 8 | N/mm² | ISO 4587 |
