• Item Name: PERMABOND 791
• Manufacturer: Permabond
• Technologies: Ethyl cyanoacrylate
• Color: Colourless
• Cure Type: Room temperature, moisture-activated, rapid cure
• Package Size: Contact to Techniq VN for details.
• Shelf Life: 12 months
PERMABOND® 791 is a low-viscosity, surface-insensitive ethyl cyanoacrylate adhesive. It is designed to bond rapidly to substrates with acidic surfaces such as wood and plated metals, as well as plastics, ceramics, elastomers, and other common materials. Its very fast cure speed minimizes frosting and fogging, making it suitable for high-speed production lines.
Key features:
Extremely fast setting (2–3 seconds)
Rapid development of high strength
No mixing or heat cure required
Surface insensitive (works on acidic and difficult substrates)
100% reactive, solvent-free
Approved to CID A-A-3097 Type II Class I
Bonding wood, plated surfaces, metals, ceramics, elastomers, plastics
High-speed assembly and production lines
Applications requiring very rapid cure with minimal blooming/frosting
| Property | Value |
|---|---|
| Chemical composition | Ethyl cyanoacrylate |
| Appearance | Colourless |
| Viscosity @ 25°C | 30–50 mPa·s (cP) |
| Density | 1.06 |
| Maximum gap fill | 0.1 mm (0.004 in) |
| Cure speed (Steel) | 2–3 sec |
| Cure speed (Buna N Rubber) | 2–3 sec |
| Cure speed (Phenolic) | 2–3 sec |
| Full strength | 24 hours |
| Property | Value |
|---|---|
| Shear strength (Steel, ASTM D-1002) | 18–22 N/mm² (2600–3200 psi) |
| Tensile strength | 17 N/mm² (2500 psi) |
| Glass transition temperature | 58°C (140°F) |
| Hardness | 85 Shore A |
| Coefficient of thermal expansion | 90 × 10⁻⁶ mm/mm/°C |
| Thermal conductivity | 0.1 W/(m·K) |
| Temperature resistance | -55°C to +150°C (briefly higher for processes like paint baking/wave soldering) |
| Environment | Strength Retention |
|---|---|
| Air (Reference) | 100% |
| 95% RH @ 40°C | ~80% |
| Unleaded Gasoline | ~80% |
| Motor Oil @ 40°C | ~100% |
| Water | ~70% |
| Ethanol | ~60% |
| Isopropanol | ~60% |
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