Product Name
Permabond 825 Cyanoacrylate Instant Adhesive high viscosity, fast curing, surface insensitive adhesive
Brief Description
Permabond 825 is a low viscosity, modified ethyl cyanoacrylate instant adhesive engineered for applications requiring high temperature resistance, up to 200°C (392°F). It offers rapid curing and excellent strength retention even after prolonged thermal aging, bonding a wide variety of materials without the need for a secondary heat or post-cure. [2, 3, 5, 8, 9, 10, 12]
Popular Applications & Uses
- High-speed production lines [2, 9, 10]- Electronics assembly [3, 12]- Electric motor manufacturing [3, 12]- E-mobility battery applications [3, 12]- Bonding metals, rubbers, and plastics [2, 3, 5, 8, 9, 10]- Applications requiring high temperature resistance [2, 3, 5, 8, 9, 10, 12]- Wire tacking and strain relief [13]
Industries that Commonly Use It
- Aerospace/Defense [8]- Automotive Service/Repair [8]- Electrical Services or Products [3, 12]- General Manufacturing [2, 9, 10]- LED/Electronics [3, 12]- Metal Fabrication [8, 10]- Plastic Fabrication [8, 10]- Transportation/ Specialty Vehicle [3, 8, 12]
Special and Unique Features
- Exceptional high temperature resistance (up to 200°C/392°F) without requiring a secondary heat or post-cure [3, 8, 9, 12]- Excellent strength retention during thermal aging [2, 3, 8, 9, 10]- Rapid curing speed [2, 3, 8, 9, 10]- Ease of use – single component, no mixing required [9, 10]- 100% reactive, containing no solvents [8, 9, 10]- Surface insensitive properties, aiding bonding to various substrates [13]
Key Properties
- Chemical composition: Modified Ethyl Cyanoacrylate [2, 5, 9, 10]- Appearance: Colourless (Clear) [5, 9, 12]- Viscosity @ 25°C: 100-150 mPa.s (cP) [5, 9, 10]- Maximum gap fill: 0.15 mm (0.006") [5, 8, 9, 10]- Fixture/handling time: Varies by substrate, typically 5-60 seconds (e.g., Steel: 10-20s, NBR: 5-10s, Phenolic: 5-10s, HDPE: 10-20s, LDPE: 40-60s) [9, 10]- Full strength: Achieved within 24 hours [9, 10]- Service Temperature: -55°C to 200°C (-65°F to 392°F) [5, 8]- Shear Strength (Mild Steel): 15-20 N/mm² (2175-2900 psi) [5, 9]
Surface Compatibility
- Metals (e.g., mild steel, stainless steel, aluminum) [2, 3, 5, 8, 9, 10]- Rubbers (e.g., NBR, Buna N) [2, 3, 5, 8, 9, 10]- Plastics (e.g., acrylic, polycarbonate, ABS, PVC, low- and high-density polyethylene, phenolic) [2, 3, 5, 8, 9, 10]- Ceramics [7, 15]- Porous and acidic surfaces (due to surface insensitive nature) [13, 15]
Known backups / known substitutes
- Other Permabond Cyanoacrylates: Permabond 801, Permabond 820, Permabond 920, Permabond 240, Permabond 105, Permabond 792, Permabond 802 [11, 14, 15, 16]- Loctite Cyanoacrylates: Loctite 3801, Loctite 3805, Loctite 401, Loctite 406, Loctite 408, Loctite 424, Loctite 454 [17]- For general high heat resistance (though lacking fast cure): Epoxies, Silicones, Polyurethanes [8]
Comparison Note
Permabond 825 stands out among cyanoacrylate adhesives due to its exceptional high temperature resistance, capable of withstanding up to 200°C (392°F) without the need for a secondary heat cure. [8] This is a significant advantage over many traditional cyanoacrylates that typically lose performance at much lower temperatures (around 80-100°C). [8] While the product name in the prompt includes "high viscosity," search results consistently describe Permabond 825 as a low viscosity adhesive (100-150 mPa.s). [5, 9, 10] This low viscosity, combined with its rapid curing and surface insensitive properties, makes it ideal for high-speed production lines and precise bonding applications where both speed and thermal stability are critical. [2, 8, 9, 10]
