• Item Name: EPIBOND® 420 A/B
• Manufacturer: Huntsman
• Technologies: Modified Epoxy, 2K Structural Adhesive
• Color: Contact to Techniq VN for details.
• Cure Type: Room Temperature / Thermal Post-Cure Options
• Package Size: Bulk, Cartridges, Kit
• Shelf Life: 12 months
EPIBOND® 420 A/B is a two-component, room-temperature curing modified epoxy adhesive paste designed for high-strength, high-toughness bonding. It is suitable for metals, honeycomb structures, and fiber-reinforced composites, providing excellent shear and peel strength. The adhesive contains 5 mil (125 µm) spacer beads for uniform bond lines in high-stress areas. EPIBOND® 420 A/B replaces REDUX 410 NA and meets BMS 5-107 requirements. Its combination of toughness, resilience, and room-temperature cure makes it ideal for demanding aerospace structural applications.
Aerospace Applications: Composite panels, Honeycomb Composites, Honeycomb Structures, Space Shuttle, Spacecraft
Substrates: Metals, Composites
Product End Uses: Structural bonding in high-stress areas
Application Method: Manual or pneumatic dispensing through static mixing nozzle; spatula for thin layers
Industry Benefits: Provides consistent bond lines, high peel and shear strength, resilient structural joints, suitable for demanding aerospace specifications
Before Mixing
| Property | Value | Unit | Test Method / Condition |
|---|---|---|---|
| Mix Ratio (Hardener:Resin) | 0.4 | % (W) | – |
| Physical Form | Paste | – | – |
| Density | 1.05 | g/cm³ | ASTM D792 |
| Gel Time at 77°F | 70 | min | – |
| Material Temperature | >18 | °C | Mixing requirement |
After Mixing / Cured
| Property | Value | Unit | Test Method / Condition |
|---|---|---|---|
| Lap Shear Strength | 4,500 | psi | ASTM D1002, Al-Al, 25°C |
| Lap Shear Strength | 500 | psi | ASTM D1002, Al-Al, 82°C |
| Compressive Strength | 6,400 | psi | ASTM D695, Al-Al, 121°C |
| Compressive Strength | 480 | psi | ASTM D695, Al-Al, 25°C |
| Tensile Strength | 5,200 | psi | ASTM D638, 82°C |
| Tensile Modulus | 238 | ksi | ASTM D638 |
| Elongation | 4.2 | % | ASTM D638 |
| Flexural Strength | 8,400 | psi | ASTM D790 |
| Flexural Modulus | 277 | ksi | ASTM D790 |
| T-Peel Strength | 41 | pli | ASTM D3167, Al, 25°C, 0.279 mm bond |
| Glass Transition Temperature | 61 | °C | DMA E’ onset |
| Hardness | 70 | Shore D | ASTM D2250 |
| Insert Shear Strength | 1,400–1,500 | psi | BMS 5-107, As cured / 30 days 60°C, 95% RH |
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