It’s a common misconception that retaining compounds work by acting like a high-friction paste. Users sometimes expect these adhesives to mechanically ‘grab’ surfaces like sandpaper or a knurled surface, believing this will instantly boost rotational resistance or slippage prevention. When a part still slips or rotates under extreme load, this misunderstanding leads to disappointment.
The Reality: Retaining compounds are not friction enhancers; they are anaerobic adhesives that fill the microscopic voids in the joint and then cure into a solid, plastic-like thermoset polymer. Their function is to create a solid, molecular bond between the two surfaces, effectively making the assembly one piece.
The strength you feel is shear strength and breakaway torque, not friction.
The Solution: Maximize the Bond to Prevent Movement
To correct this misunderstanding and prevent slippage, the focus must shift entirely from friction to achieving the absolute maximum structural bond strength possible. You need a compound that completely eliminates all clearance and delivers superior structural integrity.
Incure WeldLock™ 330 Green Retaining Compound
For users who need to eliminate all rotational or axial movement and are seeking the highest possible structural integrity—far beyond what friction could provide—we recommend the Incure WeldLock™ 330 Green Retaining Compound.
This compound is formulated to deliver maximum shear strength, creating a near-welded hold that is entirely dependent on the adhesive bond, not on frictional forces.
| Key Feature | Benefit for Structural Integrity (Non-Friction) |
| Exceptional Strength (25 N/mm2) | This ultra-high shear strength rating provides a structural lock, making the joint resist rotational and axial forces better than any friction-based method. |
| Excellent Gap Fill (0.26mm) | The superior gap-filling capability ensures every microscopic void is filled, maximizing the surface area available for the chemical bond. |
| High Viscosity (2500 MPa⋅s) | Helps contain the compound within the joint area, guaranteeing a dense, full cure that translates directly into a powerful structural bond. |
| Permanent Hold | Designed for applications requiring a durable, permanent fixture that will not loosen, even under heavy vibration or cyclical loads. |
WeldLock™ 330 works by creating a true monolithic assembly. It doesn’t increase the friction between parts; it eliminates the joint where friction would normally occur, replacing it with a far stronger structural bond.
Understanding the Structural Advantage
Instead of relying on the weak, inconsistent forces of friction from a press fit, WeldLock™ 330 uses these principles:
- Total Contact: It fills 100% of the air gaps, ensuring full surface contact, which is impossible with a mechanical fit alone.
- Anaerobic Cure: The compound cures in the absence of air and in the presence of metal ions, forming a tough polymer that chemically adheres to both surfaces.
- Load Distribution: This total bond distributes stress across the entire surface area of the joint, preventing concentrated stress points that lead to slippage and eventual fatigue failure.
Achieve True Structural Locking (Not Just Friction) with Incure WeldLock™ 330 Green Retaining Compound