Which Loctite Is Strongest? A Guide to Choosing the Right Adhesive
Loctite offers a variety of high-performance adhesives, with the strongest choice depending on the application. The main categories include:
-
Threadlockers (prevent fasteners from loosening):
- Loctite 243 (medium strength, removable)
- Loctite 263 (high strength, permanent, best for heavy machinery)
-
Epoxies (structural bonding for extreme durability):
- Loctite EA E-120HP (bonds metals, composites, and plastics with up to 5,000 PSI strength)
-
Super Glues (Cyanoacrylates) (quick and strong bonding):
- Loctite 411 (high impact resistance, works on non-porous materials like metal and plastic)
Factors Affecting Bond Strength:
- Surface preparation (clean, dry, grease-free)
- Material compatibility (matching the right adhesive to the material)
- Curing time (some require hours or days for full strength)
- Environmental conditions (temperature, moisture, and chemical exposure)
| Application | Strongest Loctite Product | Key Features |
|---|
| Threadlocking | Loctite 263 | High-strength, vibration-resistant |
| Structural Bonding | Loctite EA E-120HP | Withstands 5,000 PSI, chemical-resistant |
| Quick Repairs | Loctite 411 | Superior impact resistance, versatile bonding |
