LOCTITE M-21HP
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
- Two-Component Adhesive System
- High Peel Resistance
- Room-Temperature Curing Epoxy Bonding
Product Description
LOCTITE® EA M-21HP™ is a two-part, high-performance epoxy adhesive that cures at room temperature to form a tough off-white bond line with excellent peel resistance, high shear strength, and outstanding durability. The cured adhesive provides excellent bonding to metals, plastics, glass, and composite materials while offering strong resistance to chemicals and solvents. It also functions as an excellent electrical insulator and has been evaluated to ISO-10993 biocompatibility standards for use in medical device assembly applications.
Key Features & Benefits
- Two-component epoxy adhesive system.
- High peel resistance and high shear strength.
- Room-temperature curing after mixing.
- Excellent adhesion to glass, plastics and metals.
- Excellent resistance to chemicals and solvents.
- Provides excellent electrical insulation.
- Suitable for disposable medical device assembly.
- Tested to Henkel protocols based on ISO-10993 biocompatibility standards.
Recommended Applications
- Medical device assembly.
- Structural bonding of metals and plastics.
- Glass bonding applications.
- Electrical insulation assemblies.
- General-purpose industrial bonding.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Epoxy | — | Two-part adhesive |
| Appearance (Resin) | Off-White to Beige Liquid | — | Part A |
| Appearance (Hardener) | Light Straw Colored Liquid | — | Part B |
| Appearance (Mixed) | Off-White | — | Mixed adhesive |
| Mix Ratio (Weight) | 100 : 55 | Resin : Hardener | By weight |
| Mix Ratio (Volume) | 2 : 1 | Resin : Hardener | By volume |
| Resin Viscosity | 65,000 | mPa·s (cP) | Brookfield RVT, 25°C |
| Hardener Viscosity | 7,000 | mPa·s (cP) | Brookfield RVT, 25°C |
| Specific Gravity (Mixed) | 1.03 | — | 25°C |
| Gel Time | 10 - 25 | minutes | 22°C |
| Working Life | 20 | minutes | Typical |
| Tack Free Time | 40 | minutes | Typical |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Glass Transition Temperature (Tg) | 60 | °C | ASTM E228 |
| Shore Hardness | 74 - 84 | Shore D | ISO 868 |
| Elongation at Break | 8 | % | ISO 527-2 |
| Tensile Strength | 39 | N/mm² | ISO 527-2 |
| Dielectric Breakdown Strength | 20 | kV/mm | IEC 60243-1 |
| Lap Shear Strength (Steel) | 22.6 | N/mm² | 5 day cure @ 22°C |
| Lap Shear Strength (Aluminum) | 28.2 | N/mm² | Etched & abraded aluminum |
| Lap Shear Strength (Stainless Steel) | 22.0 | N/mm² | 5 day cure @ 22°C |
| Block Shear Strength (Glass) | 32.3 | N/mm² | ISO 13445 |
| Block Shear Strength (Epoxyglass) | 28.6 | N/mm² | ISO 13445 |
