The “working time,” or open time, of a retaining compound is a critical factor in precision assembly. Once the compound is applied and the parts are brought together, the clock is ticking. Delays, minor repositioning, or complex assemblies can easily exceed this limit, causing the compound to begin to set (fixture). This can lead to improper seating, component misalignment, or a significantly weaker final bond.
The challenge is often a mismatch: using a compound with an extremely fast fixture time (e.g., 5 minutes) on an assembly that requires more time for setup or adjustment.
The Solution: Controlled Speed for Optimized Working Time
To confidently assemble and reposition parts without the rush, you need a high-quality compound with an extended, but still manageable, fixture time. This provides a longer open window while still curing quickly enough to prevent component shift.
Incure WeldLock™ 365 Green Retaining Compound
For assemblies that require controlled working time for precise positioning, complex setups, or slight delays, we recommend the Incure WeldLock™ 365 Green Retaining Compound.
This compound provides a generous working window while still delivering a high-strength, reliable bond once cured.
| Key Feature | Benefit for Extended Working Time |
| Controlled Fixture Time | Sets in 10–30 minutes. This extended window is ideal for intricate assemblies or when you need time for final alignment before the compound locks. |
| High Strength Bond | Delivers excellent retention, ensuring the extended fixture time does not compromise the ultimate structural integrity of the final bond. |
| Medium Viscosity (1250 MPa⋅s) | The manageable viscosity allows for controlled application and prevents immediate run-out, aiding in smooth, unhurried assembly. |
| Fills Gaps up to 0.25mm | Works effectively across typical press-fit tolerances, giving you confidence in the bond while you take the necessary time to assemble. |
WeldLock™ 365 gives you the breathing room you need to execute precise, complex assemblies without the panic of a race against the clock.
Techniques for Maximizing Your Working Window
Even with the controlled fixture time of WeldLock™ 365, smart assembly practices are essential:
- Work in Moderate Conditions: Curing speed is affected by temperature. Working in a cool environment (lower room temperature) can subtly extend the working time, giving you a few extra minutes for complex maneuvers.
- Apply to the Inactive Part: If possible, apply the compound only to the less-active metal surface first (e.g., aluminum) to slightly delay the initial reaction until the active metal (e.g., steel) is introduced.
- Avoid Primer/Activator: Unless absolutely necessary for inactive metals, avoid using a primer/activator. These products are designed to reduce open time, which is exactly what you are trying to avoid in a complex assembly.
- Practice the Assembly: For highly complex or critical parts, dry-fit the assembly a few times before compound application. This ensures you execute the actual bonding step as smoothly and quickly as possible, even with a generous open time.
Get the Working Time You Need with Incure WeldLock™ 365 Green Retaining Compound