Description
Permabond 825 is a low viscosity modified ethyl cyanoacrylate suitable for applications where high temperature resistance is required. This material is fast setting and has good adhesion to rubber, metal and plastics. Permabond 825 has excellent retention of strength during thermal ageing.
Cyanoacrylate adhesives are single component adhesives that polymerize rapidly when pressed into a thin film between parts. The moisture adsorbed on the surface initiates the curing of the adhesive. Strong bonds are developed extremely fast and on a great variety of materials. These properties make Permabond cyanoacrylates the ideal adhesives for high speed production lines.
Features & Benefits
- High temperature resistance
- Rapid curing
- Ease of use – no mixing or heat cure
- 100% reactive, no solvents
- Excellent thermal ageing
Physical Properties of Uncured Adhesives
| Chemical composition | Ethyl cyanoacrylate |
| Appearance | Colourless |
| Viscosity @ 25°C | 100-150 mPa.s (cP) |
Typical Curing Properties
| Maximum gap fill | 0.15 mm 0.006 in |
| Fixture / handling time* (0.3 N/mm² shear strength is achieved) |
10-20 seconds (Steel) 5-10 seconds (NBR) 10-15 seconds (Buna N Rubber) 5-10 seconds (Phenolic) 10-20 seconds (HDPE) 40-60 seconds (LDPE) |
| Full Strength | 24 hours |
*Handling times can be affected by temperature, humidity and specific surfaces being bonded. Larger gaps or acidic surfaces will also reduce cure speed but this can be overcome by the use of Permabond C Surface Activator (CSA) or Permabond QFS 16.
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