The failure of a cured seal due to vibration, shock, or movement (thermal cycling) indicates that the sealant used is merely a passive filler and does not possess the structural strength needed to lock the threads in place.

This is the key difference between materials like PTFE tape or non-hardening pipe dope, and high-performance anaerobic thread sealants.

The Failure Mechanism: Clamping Force Loss

Threads are designed to seal by compression, relying on a static clamping force to hold the joint together. When a joint is exposed to vibration or thermal cycling:

1. Micro-Movement: The small, microscopic gaps between the male and female threads allow the components to shift slightly (side-sliding motion).
2. Clamping Force Erosion (Self-Loosening): This micro-movement quickly and dramatically reduces the critical clamping force of the joint.
3. Seal Path Creation: As the clamping force drops and the threads move, the non-structural sealant (dope or tape) is fatigued, allowing a leak path to develop.
4. Anaerobic Advantage: Anaerobic sealants fill the gaps and cure into a durable plastic that bonds the threads together, effectively creating a solid, vibration-proof unit that prevents the initial micro-movement and maintains the clamping force.

The Solution: A Medium-Strength, Vibration-Resistant Anaerobic Sealant

For systems—especially hydraulic, pneumatic, and powertrain applications—that must withstand movement and shock, a sealant must provide a locking force in addition to a seal.

We recommend Incure ProGrip™ 206 Medium Strength Thread Sealant for High-Pressure Pipes as an excellent all-around solution.

Why ProGrip™ 206 Stops Dynamic Leaks:

• Medium Strength Locking: This sealant cures to a rigid plastic that delivers a specific, measurable amount of breakaway torque. This torque value is the force needed to undo the cured seal, and it is a direct measure of the sealant’s ability to lock the threads against loosening from vibration and shock.
• High-Pressure Seal: With a maximum sealing pressure of up to 69MPa (10,000 psi), it maintains its integrity even when internal pressure fluctuates rapidly.
• Controlled Disassembly: As a medium-strength product, it provides the required locking force to resist vibration, but still allows the joint to be disassembled later using standard hand tools, making it ideal for maintenance-required systems.
• Non-Shrinking Cure: Unlike solvent-based pastes, the anaerobic cure process does not involve solvent evaporation, so the cured material will not shrink away from the threads over time, guaranteeing a reliable long-term seal.

ProGrip™ 206 is engineered to transform a vulnerable, dynamic connection into a solid, locked, and sealed assembly.

Summary of Actionable Steps

To ensure your sealed joints resist vibration and movement:

1. Ditch the Passive Fillers: Stop using PTFE tape or non-hardening pipe dopes in systems subject to high vibration or dynamic loads.
   
2. Switch to Anaerobic: Use a medium- or high-strength anaerobic thread sealant (like ProGrip™ 206) that is specifically formulated to lock and seal the threads.
   
3. Ensure Full Cure: Allow the sealant the full 24 hours at room temperature to reach its maximum locking strength before subjecting the system to operating pressure or high vibration.
   
4. Clean Threads: The chemical lock is only as good as the adhesion. Ensure threads are clean and free of oil or grease for maximum bond strength.