Product Name
Permabond 920 Instant Adhesive-Fast-Set, Thin Viscosity, 2-Step High-Temp Resistant
Brief Description
Permabond 920 is an original allyl cyanoacrylate adhesive, commonly known as an instant adhesive or super glue, engineered for rapid, strong bonding across a diverse range of materials. It is characterized by its low viscosity, allowing it to penetrate small gaps and form thin, strong bonds. A key feature is its exceptional high-temperature resistance, achieving up to 250°C (482°F) after a secondary heat post-curing process. This single-component adhesive cures quickly at room temperature upon contact with surface moisture, making it ideal for high-speed production lines.
Popular Applications & Uses
- Bonding metals such as steel, aluminum, and zinc.
- Adhering various plastics including ABS, PVC, polycarbonate, and phenolic.
- Bonding different types of rubber.
- Applications requiring high-temperature resistance, especially after a post-cure.
- Wire tacking and surface mount applications in electronics.
- Industrial manufacturing where fast-setting and strong bonds are crucial.
Industries that Commonly Use It
- Aerospace/Defense: Utilized for its high-temperature resistance and MIL-SPEC compliance.
- LED/Electronics: Ideal for bonding components, wire tacking, and lighting applications due to its fast cure and material compatibility.
- General Manufacturing: Employed in various industrial manufacturing processes requiring rapid and strong assembly.
- Medical Device/ Prosthetics: Suitable for medical applications, having passed cytotoxicity testing.
- Government & Military: Meets MIL-A-46050C Type V, Class 2 specifications.
- Metal Fabrication: Provides excellent bond strength to steel, aluminum, and other metals.
- Plastic Fabrication: Effective for bonding a wide variety of plastic substrates.
Special and Unique Features
- **2-Step High-Temperature Resistance:** Achieves thermal resistance up to 250°C (482°F) after a secondary heat post-curing process (bonding at room temperature for 4 hours, then heating at 150°C (302°F) for 2 hours).
- **MIL-SPEC Compliant:** Approved to MIL-A-46050C Type V, Class 2 (existing designs).
- **Cytotoxicity Tested:** Suitable for medical and bio-sensitive applications.
- **Fast-Setting Formula:** Achieves fixture/handling strength in 10-20 seconds on most surfaces.
- **Low Viscosity:** Allows for bonding of closely fitting parts and penetration into small gaps (up to 0.15 mm / 0.006 in).
- **Single-Part, Solvent-Free:** Requires no mixing, is 100% reactive, and contains no solvents, making it easy to use and eco-friendly.
Key Properties
- Chemical Composition: Allyl Cyanoacrylate.
- Appearance: Clear, colorless liquid.
- Viscosity @ 25°C: 80 mPa.s (cP) (low viscosity).
- Gap Fill: Up to 0.15 mm (0.006 in).
- Fixture/Handling Time: 10-20 seconds (e.g., Steel: 15-20 sec; Buna-N Rubber: 10-15 sec; Phenolic: 10-15 sec).
- Full Cure Time: 24 hours.
- Operating Temperature Range: -55°C to 250°C (-65°F to 482°F) after post-cure.
- Shear Strength (ISO 4587): Steel: 19-23 N/mm² (2800-3300 psi); Aluminum: 8-9 N/mm² (1200-1300 psi).
- Hardness (ISO868): 85 Shore D.
- Flash Point: 95°C (203°F).
Surface Compatibility
Permabond 920 provides excellent bond strength to a wide variety of materials, including:
- Metals: Steel, Aluminum, Zinc, Copper, and its alloys (benefiting from light abrasion).
- Plastics: ABS, PVC, Polycarbonate, Phenolic, Polystyrene, Valox, PBT.
- Rubbers: Buna-N Rubber, Gum Rubber, and other types of rubber.
- Ceramics: Bonds well to ceramics.
Surfaces should always be clean, dry, and grease-free for optimal bonding. Acetone or isopropanol can be used for degreasing.
Known backups / known substitutes
Permabond 920 is a premium, heat-resistant bonding solution. For customers seeking alternatives, comparable products include:
- Loctite® 4203
- 3M™ Scotch-Weld™ PR600
- Permatex® High-Temperature Super Glue
- Permabond 825 (offers high temperature resistance without secondary heat cure, but up to 200°C)
- Permabond 801 (low viscosity modified ethyl cyanoacrylate for high temp resistance)
Comparison Note
Permabond 920 stands out among instant adhesives due to its unique allyl cyanoacrylate chemistry, which provides significantly higher temperature resistance (up to 250°C / 482°F) compared to many standard cyanoacrylates, especially after its recommended 2-step post-curing process. While other Permabond cyanoacrylates like Permabond 825 offer high-temperature resistance without a secondary cure, Permabond 920 achieves a higher ultimate temperature rating. Its low viscosity ensures fast setting and strong bonds on closely fitted parts, making it a versatile choice for demanding applications where both speed and thermal performance are critical.
