Securing press-fit fasteners in airframe structures is a mission-critical application. These joints are constantly subjected to extreme cyclical fatigue, high G-load stress, and wide temperature variations unique to aerospace environments. The fasteners must maintain absolute, permanent retention to ensure structural integrity and flight safety. This is a non-negotiable High Strength, Permanent application.
INCURE WeldLock™ 347 Retaining Compound (Green)
The INCURE WeldLock™ 347 Retaining Compound is the definitive choice for securing fasteners and bushings in airframe components. It provides a superior, permanent structural bond designed to withstand extreme dynamic forces and temperature stability.
| Key Feature | Performance for Airframe Fasteners |
| High Strength, Fast Curing | Creates a monolithic bond that resists immense cyclical stress and structural vibration, preventing fastener movement, loosening, or catastrophic failure. |
| Temperature Resistance (175∘C) | Maintains full structural integrity across the wide temperature range encountered in aerospace applications (e.g., ground heat and high-altitude cold). |
| Ideal Gap Fill (Up to 0.15mm) | Perfectly secures press-fit fasteners, eliminating the microscopic play that causes fretting corrosion and stress fatigue in load-bearing joints. |
| Core Application | Suited for securing high-load static and rotating elements, matching the severe demands of aerospace structures. |
Application Steps: Installing Press-Fit Fasteners
For maximum structural integrity and reliable, permanent retention of the fasteners, follow these steps:
1. Surface Preparation (The Foundation)
- Clean: Thoroughly clean the fastener surface and the bore in the airframe structure. Surfaces must be free of all oils, grease, and contaminants. Use an industrial cleaner suitable for aerospace metals (e.g., acetone or specialized solvent) and wipe dry.
- Activate (If Needed): For maximum cure speed and strength, especially on critical assemblies or passive metals, apply a chemical activator to the bond surfaces and allow it to flash off completely.
2. Product Application
- Apply: Apply a continuous, thin coating of WeldLock™ 347 around the full circumference of the fastener/pin or the internal bore of the housing.
- Ensure Coverage: Ensure the adhesive completely wets the entire mating surface as the fastener is inserted.
3. Assembly and Curing
- Assemble: Immediately press or drive the fastener into the bore. Ensure the component is fully seated and aligned correctly before the compound fixtures.
- Wipe Excess: Remove any excess adhesive visible outside the joint immediately after assembly.
- Cure: Allow the assembly to fixture before handling (typically 5 minutes). Allow a full 24 hours for the compound to reach maximum structural strength before placing the airframe section into service or subjecting it to load/testing.