ThreeBond 1731 is a high peel strength, impact-resistant cyanoacrylate adhesive formulated with α-cyanoacrylate and an elastomer modifier for superior flexibility and rubber adhesion. Manufactured by ThreeBond International, it achieves material failure on all major rubber substrates (NBR, CR, SBR, NR, EPDM) and delivers 34 kJ/m² impact strength on steel — significantly higher than standard cyanoacrylates. It is also moisture resistant and suitable for large bonding areas.
Features & Benefits
- Achieves material failure on NBR, CR, SBR, NR, and EPDM — the strongest rubber bond possible
- 34 kJ/m² impact strength on steel — exceptionally impact resistant vs. standard cyanoacrylates
- High T-peel strength: 3.0 kN/m on steel (material failure on rubbers)
- Moisture resistant formulation — suitable for humid environments and large bonding areas
- Elastomer modifier provides flexibility and shock absorption in bonded joints
- Effective on metals: 20.0 MPa (Steel), 17.0 MPa (SUS), 11.0 MPa (Aluminum)
Typical Applications
- Bonding speaker frames to magnets in audio transducers and consumer electronics
- Bonding coil terminals, insulators, and O-rings in electronic and electrical assemblies
- Metal-to-rubber bonding of damping and sealing components in automotive assemblies
- Bonding rubber parts and flexible substrates requiring impact and peel resistance