Applications

PERMABOND 920 – Rapid curing allyl cyanoacrylate adhesive for metals, plastics, rubber, high-temperature applications

Item Name: PERMABOND 920
Manufacturer: Permabond
Technologies: Allyl cyanoacrylate
Color: Colourless
Cure Type: Room temperature, pressure-activated; secondary heat cure for high temperature resistance
Package Size: Contact to Techniq VN for details.
Shelf Life: 12 months

1. Product Overview

PERMABOND® 920 is the original allyl cyanoacrylate adhesive. It is a single-part, low-viscosity liquid that cures rapidly at room temperature when pressed into a thin film. Fixture strength is achieved within 10 seconds on most substrates, with full cure in 24 hours.

Key features include:

  • Rapid development of high strength

  • Ease of use (no mixing or heat cure required)

  • Bonds a wide range of materials (metals, plastics, rubber)

  • 100% reactive, solvent-free

  • Specially designed for high-temperature resistance up to 250°C when post-cured

Approved to MIL-A-46050C Type V Class 2.


2. Applications

  • Bonding steel, aluminum, zinc, and other metals

  • Bonding plastics such as ABS, PVC, PC, and phenolic

  • Bonding rubbers (e.g., Buna N)

  • High-temperature environments (e.g., paint baking, wave soldering)

  • General industrial assembly requiring fast cure and high strength

3. Typical Properties

a) Uncured Adhesive

Property Value
Chemical composition Allyl cyanoacrylate
Appearance Colourless liquid
Viscosity @ 25°C 70–90 mPa·s (cP)
Density 1.05
Maximum gap fill 0.15 mm (0.006 in)
Cure speed (Steel) 15–20 sec
Cure speed (Buna N Rubber) 10–15 sec
Cure speed (Phenolic) 10–15 sec
Full strength 24 hours

b) Cured Adhesive

Property Value
Shear Strength (Steel, ASTM D-1002) 19–23 N/mm² (2800–3300 psi)
Shear Strength (Aluminium) 8–9 N/mm² (1200–1300 psi)
Shear Strength (Zinc) 10 N/mm² (1450 psi)
Shear Strength (ABS) >6 N/mm² (900 psi) – SF
Shear Strength (PVC) >6 N/mm² (900 psi) – SF
Shear Strength (PC) >5 N/mm² (700 psi) – SF
Shear Strength (Phenolic) 14 N/mm² (2000 psi)
Impact Strength (ASTM D-950) 6–14 kJ/m² (3–7 ft-lb/in²)
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 +250°C (with post cure)

c) Chemical Resistance (1000 hrs at 22°C)

Environment Strength Retention
Air (Reference) 100%
95% RH at 40°C ~80%
Unleaded Gasoline ~80%
Motor Oil @ 40°C ~100%
Water ~70%
Ethanol ~60%
Isopropanol ~60%

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