Many conventional sealants (like PTFE tape or non-curing pastes) fail under high pressure not because the material can’t handle the force, but because they can’t handle the spiral leak path created by threaded pipe connections.

1. Compression vs. Cure

• PTFE Tape & Paste: These rely on compression to fill the voids. Under high, constant pressure, the soft material can creep or extrude, especially in microscopic gaps, leading to a slow, catastrophic failure over time—the leak appears at a seemingly “lower” pressure than expected.
• Anaerobic Sealants (The Solution): These are liquids that fill 100% of the voids and then cure into a hard, thermoset plastic plug. This solid bond eliminates the spiral leak path and provides an extremely high burst resistance. However, if the threads are not properly cleaned or the sealant isn’t given full cure time (typically 24 hours), the seal remains partially liquid and will fail under pressure.

2. The Cleanliness Factor

The most common reason for a high-pressure sealant failure is poor surface preparation. Anaerobic sealants require metal-to-metal contact to cure properly. Oil, grease, or old pipe dope residue acts as a barrier, preventing the chemical cure and resulting in a weak, non-cured section that quickly blows out under system pressure.

The Chemical Attack: Why Sealants Dissolve

When a sealant is failing in a system containing refrigerants, solvents, or aggressive chemicals, you’re experiencing a chemical incompatibility issue.

Many standard sealants offer good resistance to water or air, but the chemicals found in modern industrial systems are highly corrosive or powerful solvents:

• Refrigerants: Certain refrigerants (especially older or specialized blends) can act as solvents, causing standard sealants to soften, swell, or literally dissolve and wash out of the thread root, contaminating the system and creating a leak.
• Strong Solvents/Fuels: Gasoline, diesel, hydraulic fluids, and industrial cleaners can all attack and break down incompatible polymer compounds, leading to complete seal failure.

For these applications, you need a product formulated with a cured chemistry that is specifically chemically resistant to the harshest fluids.

Incure ProGrip™ 202 Refrigerant Thread Sealant

For demanding applications involving high pressure combined with aggressive media, the specialized choice is Incure ProGrip™ 202 Refrigerant Thread Sealant with Chemical Resistance.

The ProGrip™ 202 Advantage: Refrigerants and Harsh Media

While other anaerobic sealants are strong, ProGrip™ 202 is engineered to solve the toughest chemical compatibility and pressure problems:

• Ultimate Chemical Resistance: It is formulated with a highly stable anaerobic chemistry that resists the aggressive solvent action of virtually all common refrigerants, as well as many industrial oils, fuels, coolants, and solvents. This stops the “dissolving” failure.
• High Pressure Seal: Like all high-grade anaerobic sealants, ProGrip™ 202 achieves a solid, tough seal within the threads, providing superior burst resistance that prevents leakage even at extreme system pressures.
• Medium Strength (Serviceable): It provides a secure, permanent seal against leaks and vibration but is classified as Medium Strength, meaning you can still disassemble the connections for maintenance using standard hand tools. This is critical in expensive HVAC and refrigeration systems.

Application Checklist: High-Pressure & Chemical Systems

To ensure your high-pressure, chemical-resistant sealant works as advertised, you must follow the professional procedure. Skipping these steps is the #1 cause of failure, regardless of the product’s quality.

1. Preparation is Non-Negotiable: Clean both the male and female threads with a solvent cleaner (like acetone or brake cleaner) to remove every trace of oil, grease, old sealant, or metal filings. This ensures the necessary metal-to-metal contact for a complete cure.
   
2. Apply Correctly: Apply a continuous bead of ProGrip™ 202 to the male threads. Ensure the material covers the engaged threads but do not apply to the very first thread; this prevents contamination of the system fluid.
   
3. Tighten and Wait (The Critical Step): Assemble and tighten the connection to the manufacturer’s recommended torque. You may get an instant low-pressure seal, but you must wait the full 24 hours for the sealant to achieve its full chemical resistance and maximum pressure rating before commissioning the system. Premature pressurization is a guaranteed failure point.