When a retaining compound fails—leading to vibration, loosening, or creaking—the first suspect is often the compound itself. However, the true culprit is almost always uneven or poor surface preparation. Retaining compounds, which are anaerobic adhesives, rely on direct metal-to-metal contact to cure properly and achieve their rated strength. If the mating surfaces aren’t pristine, the bond will be weak, regardless of the compound’s quality.
The key to a strong, reliable bond is a combination of proper cleaning and the use of an ultra-high strength compound that can compensate for minimal surface imperfections.
The Solution: Maximize Strength to Overcome Preparation Gaps
Even with the best intentions, achieving perfectly clean and optimally rough surfaces isn’t always feasible in the workshop or field. To guarantee the strongest possible bond, you need a compound with the highest inherent strength to minimize the impact of slight preparation shortcomings.
Incure WeldLock™ 330 Green Retaining Compound
For users who need to achieve maximum retention even when surface preparation might be less than ideal (but still fundamentally clean), we recommend the Incure WeldLock™ 330 Green Retaining Compound.
This product is an ultra-high-strength solution designed to deliver exceptional performance, making it the most forgiving option for demanding applications where bond failure is not an option.
| Key Feature | Benefit for Weakened or Imperfect Surfaces |
| Exceptional Strength (25 N/mm2) | The highest-rated strength in the line, providing the ultimate factor of safety against failure even if the surface adhesion is slightly compromised. |
| High Viscosity (2500 MPa⋅s) | Helps fill larger microscopic voids or surface irregularities, ensuring full-volume cure despite minor surface flaws. |
| Excellent Gap Fill Capacity | Handles diametral gaps up to 0.26mm, compensating for worn surfaces or slight roughness variations. |
| Fast Fixturing (5 minutes) | Sets quickly, ensuring the bond initiates rapidly on the available active surface area. |
WeldLock™ 330 provides the confidence of a permanent, maximum-strength lock, acting as an essential safeguard against bond failure when environmental or time constraints limit your preparation efforts.
Essential Surface Prep Steps for Anaerobic Adhesives
While WeldLock™ 330 offers a high-strength safety net, you should always aim for the best possible surface preparation to achieve the compound’s full potential:
- Clean Vigorously: Degrease both the shaft and the housing using a suitable industrial solvent (like acetone or isopropanol). Do this until the cloth comes away clean. Oils, dirt, and cutting fluids are the number one enemy of anaerobic compounds.
- Roughen (If Possible): For the absolute best results, lightly abrade smooth surfaces with a fine emery cloth or a wire brush. This creates a rougher profile (known as profiling) that the compound can key into, increasing mechanical adhesion.
- Use an Activator (Optional): If working with inactive metals (e.g., stainless steel, aluminum, or plated surfaces), use a specialized primer/activator after cleaning. This chemically prepares the surface, ensuring a fast and complete cure, thereby maximizing the bond strength.
- Immediate Application: Apply the WeldLock™ 330 immediately after cleaning and/or activating to prevent airborne contaminants from settling back onto the surfaces.
Guarantee Your Bond Strength with Incure WeldLock™ 330 Green Retaining Compound