738 Black Magic Toughened Cyanoacrylate Adhesive, Clear, 16 oz. Bottle

Typical Applications

• Speaker Assembly
• Bonding to Black Substrates
• Black PVC Wire Bonding

Physical Properties of Uncured Adhesive

• Solids, %: 100
• Color⁽¹⁾: Black
• Viscosity, cP at 25°C: 5000
• Flash Point, °C (°F): 83 (181)
• Specific Gravity: 1.1
• Gap Filling, inches (mm): 0.020 (0.51)
• Shelf Life stored at 2°C-7°C (35°F-45°F), months: 6

(1) To obtain maximum opacity, the product should be refrigerated when not in use. The total time at meat room temperature is about 10 days before the settling of the black additive occurs reducing black intensity. Shaking will not restore the original black intensity. Vigorously shaking will restore acceptable blackness for 1-2 days. This can be done a maximum of two times.

Typical Curing Properties

• Maximum gap fill: 0.43 mm (0.017")
• Cure speed*
  
  • 6 seconds (Steel)
  • 6 seconds (Buna N Rubber)
  • 6 seconds (Phenolic)
• 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-NF) or Permabond QFS 16.

Typical Performance of Cured Adhesive

• Set Time, Seconds
  
  • Steel 25-30
  • Aluminum 30-35
  • Phenolic 5-10
  • Buna Rubber 10-15
• Lap Shear Strength, psi
  
  • 24 hours at room temperature)
  • Grit blasted/Steel: 3100
  • PVC/PVC (rigid): Substrate Failure
  • Acrylic/Acrylic: Substrate Failure
  • Polycarbonate/Polycarbonate: Substrate Failure
• Peel Strength, pli
  • 180° Peel (ASTM D903) Steel/Steel¹ Using sandblasted steel: 13.0
• Impact Resistance, ft-lb/in² (ASTM D950)
  
  • Steel/Steel: 8.0
• PVC Plasticizer Resistance
  • 180° Peel Strength, pli (ASTM D903) aged 1 week at 70°C (158°F) Flexible PVC/Steel: Substrate Failure
  • T-Peel (ASTM D1876) aged 1 week at 70°C (158°F) Flexible PVC/PVC: Substrate Failure
  • Operating Temperature °C (°F): -60 (-80) to 82 (180)

Cure Rate at 25°C

• Set time, seconds
  
  • Steel 10
  • Buna N Rubber 10
  • Phenolic 10
• Full cure, hours 24

Physical Properties of the Cured Adhesive

• Hardness (Shore A): 85
• Dielectric Strength (volts/mil), approx.: 250
• Operating Temperature, °C, (°F): -60 (80°) to 82 (180°)
• Soluble In: Nitroethane, Methyl, Ethyl, Ketone, Acetone