Permabond 791 Instant Adhesive

Description

Permabond® 791 is a low-viscosity, ultra-fast setting cyanoacrylate adhesive designed for surface-insensitive bonding, including acidic materials like wood, plated metals, ceramics, plastics, and rubbers. Its fast-curing, low-frosting formula makes it ideal for precision bonding, post-assembly applications, and high-speed production lines.

This single-component adhesive cures rapidly at room temperature upon contact with surface moisture. It meets MIL-SPEC MIL-A-46050C Type II, Class 1 (existing designs) and CID A-A-3097 Type II, Class 1 (new designs), ensuring compliance for military, aerospace, and industrial applications.

For customers looking for alternatives to Loctite® 401, 3M™ Scotch-Weld™ CA40H, or Permatex® Surface-Insensitive Super Glue, Permabond 791 offers an ultra-fast, high-strength bonding solution.

Key Features & Benefits

✅ Ultra-Fast Setting Time – Bonds in 2-3 seconds, minimizing production downtime
✅ MIL-SPEC Compliant – Meets MIL-A-46050C Type II, Class 1 and CID A-A-3097 Type II, Class 1
✅ Surface-Insensitive Formula – Bonds acidic and difficult-to-bond surfaces including wood, plated metals, ceramics, and rubber
✅ Low-Viscosity, Wicking Action – Perfect for penetrating tight-fitting parts and post-assembly bonding
✅ High Strength & Durability – Provides exceptional shear and tensile strength
✅ Single-Part, No Mixing Required – Ideal for high-speed production
✅ 100% Solids, Solvent-Free – Eco-friendly with no VOCs

Technical Specifications

• Viscosity: 15-50 mPa.s (low viscosity)
• Gap Fill: 0.1 mm (0.004 in)
• Fixture / Handling Time:
  • Steel: 2-3 sec
  • Buna-N Rubber: 2-3 sec
  • Phenolic: 2-3 sec
• Full Cure Time: 24 hours
• Shear Strength (ISO 4587):
  • Steel: 18-22 N/mm² (2600-3200 psi)
  • ABS: >6 N/mm² (870 psi)** SF
  • PVC: >10 N/mm² (1450 psi)** SF
  • Polycarbonate: >6 N/mm² (870 psi)** SF
• Tensile Strength (ISO 6922): >20 N/mm² (>3000 psi)
• Impact Strength (ASTM D-950): 3-5 kJ/m² (1.4-2.4 ft-lb/in²)
• Temperature Range: -55°C to 82°C (-65°F to 180°F)
• Color: Clear

Applications

• Post-assembly bonding and micro-crack sealing
• Wood, plated metals, ceramics, and rubber bonding
• Aerospace and military-grade fastening
• Automotive, medical device, and electronics assembly
• Rapid repairs for industrial tools and machinery

Directions for Use

1. Ensure surfaces are clean, dry, and grease-free. Use acetone or isopropanol for best results.
2. Apply Permabond 791 sparingly to one surface only.
3. For wicking applications, allow the adhesive to seep naturally into joints or cracks.
4. Quickly align and press components together. Apply even pressure to ensure a thin, even adhesive film.
5. Hold in place for 2-3 seconds until initial bond forms.
6. Allow 24 hours for full strength development.
7. For difficult or porous surfaces, use Permabond CSA or QFS 16 Activator.

🔹 Note: For bonding polypropylene, polyethylene, PTFE, or silicone, use Permabond Polyolefin Primer (POP) before applying adhesive.