Permabond 820 Instant Adhesive-Fast-Set Temperature-Resistant Thin General Purpose

Product Name

Permabond 820 Instant Adhesive-Fast-Set Temperature-Resistant Thin General Purpose

Brief Description

Permabond 820 is a low viscosity, fast-setting, modified ethyl cyanoacrylate adhesive engineered for applications requiring high-temperature resistance. It is a single-component, solvent-free instant adhesive that cures rapidly upon exposure to moisture on the substrate surfaces, forming strong bonds on a variety of materials.

Popular Applications & Uses

• Bonding components on dual-sided PCBs prior to wave soldering.
• Assembling small components in general industrial manufacturing where rapid bonding is critical.
• Mounting controls and securing plates in automotive and machinery construction.
• Manufacturing and repair of O-rings and neoprene gasketing (excluding silicone).
• Electronics assembly and repair, including wearable and consumer electronics.
• Bonding components in medical devices, such as disposable devices, tubing assemblies, and catheters.
• Aerospace and drone component bonding.
• Repair of industrial tools and equipment.
• Ideal for high-speed production lines due to its rapid curing properties.

Industries that Commonly Use It

• General Manufacturing: Widely used for various assembly tasks requiring fast, strong bonds.
• LED/Electronics: Essential for PCB assembly, component tacking, and general electronics manufacturing.
• Automotive Service/Repair: Utilized in vehicle and machinery assembly for securing parts and trim.
• Medical Device/ Prosthetics: Approved for cytotoxicity, making it suitable for certain medical device applications.
• Aerospace/Defense: Employed in the bonding of aerospace and drone components.
• Metal Fabrication: Forms strong bonds with various metal surfaces.
• Plastic Fabrication: Effective for bonding a wide range of plastics.

Special and Unique Features

• **Exceptional High-Temperature Resistance:** Withstands temperatures up to 200°C (390°F), significantly higher than typical ethyl cyanoacrylates, and can endure brief periods of even higher temperatures for processes like wave soldering.
• **Rapid Curing:** Achieves handling strength in 10-15 seconds on many substrates, enabling high-speed production.
• **Low Viscosity:** Its thin consistency (100 cPs) is ideal for applications requiring very thin bond lines or wicking into pre-assembled parts.
• **ISO10993 Cytotoxicity Approved:** Suitable for certain medical device manufacturing applications.
• **100% Reactive & Solvent-Free:** Contains no solvents, ensuring a solid bond without shrinkage from solvent evaporation.
• **Ease of Use:** A single-component adhesive requiring no mixing or heat cure, simplifying application.

Key Properties

• Chemical Composition: Modified Ethyl Cyanoacrylate
• Appearance: Colourless liquid
• Viscosity @ 25°C: 100 mPa.s (cP)
• Fixture/Handling Time: 10-15 seconds (on steel, Buna N Rubber, Phenolic)
• Full Cure Time: 24 hours
• Temperature Resistance: -55°C to 200°C (-65°F to 390°F)
• Maximum Gap Fill: 0.15mm (0.006 inches)
• Shear Strength (Steel): 19-23 N/mm² (2600-3200 psi)
• Hardness (ISO868): 85 Shore D
• Dielectric Strength: 25 kV/mm

Surface Compatibility

Permabond 820 exhibits good adhesion to a wide range of materials, including:

• Metals (e.g., steel, aluminum, copper)
• Plastics (e.g., various engineering plastics, and with a primer, low-energy plastics like PE, PP, PTFE)
• Rubbers (e.g., natural rubber, Buna N, neoprene, EPDM)
• Ceramics
• Composites
• Porous surfaces (e.g., wood, paper, cardboard, cork, leather, fabric) with surface-insensitive formulations or activators.

Known backups / known substitutes

• Permabond 825: Another heat-resistant cyanoacrylate, offering additional strength retention during thermal aging.
• Permabond 920: A general-purpose allyl cyanoacrylate adhesive with low viscosity, rapid cure, and high-temperature resistance up to 480°F, featuring a secondary cure mechanism.
• Permabond 801: A modified ethyl cyanoacrylate also suitable for high-temperature resistance.
• Permabond 240: A higher viscosity cyanoacrylate for larger gap applications and porous substrates.
• Permabond 737 Black Magic: A toughened cyanoacrylate adhesive for enhanced impact and vibration resistance.
• Other industrial-grade ethyl cyanoacrylate adhesives from various manufacturers, though Permabond 820's specific high-temperature performance and low viscosity are key differentiators.

Comparison Note

Permabond 820 distinguishes itself from many standard ethyl cyanoacrylate adhesives by offering significantly enhanced temperature resistance, capable of withstanding up to 200°C (390°F) compared to the typical 82°C (180°F) of conventional CAs. Its low viscosity and rapid cure speed make it particularly well-suited for high-speed production environments and applications requiring precise, thin bond lines, such as component tacking on PCBs. While general cyanoacrylates offer fast bonding, Permabond 820 provides the added benefit of maintaining bond integrity under elevated thermal conditions, making it a superior choice for demanding industrial applications where both speed and heat performance are critical.