Cut Gaskets vs. Liquid Gaskets: Why LOCTITE® is the Better Seal

Introduction

For decades, traditional cut gaskets have been the go-to solution for sealing flanges in mechanical assemblies. But despite their widespread use, cut gaskets have critical flaws—distortion, compression relaxation, and incomplete sealing of surface imperfections. That’s where LOCTITE® liquid gasketing steps in.

By forming seals that are custom-fit to every surface, LOCTITE® liquid gaskets eliminate the risks that come with pre-cut alternatives. If you’re looking for reliability, ease of use, and longer-lasting performance, the choice is clear.

The Problem with Cut Gaskets

Cut gaskets—typically made from paper, rubber, or composite materials—are designed to fill the gap between flanged parts and prevent leaks. However, these physical gaskets often fall short for several reasons:

• Surface Imperfections: Rigid, machined surfaces often have micro-irregularities. Cut gaskets can’t fully conform to these, leaving gaps that lead to leaks.
• Compression Set: Over time, compression forces cause cut gaskets to lose thickness, reducing sealing effectiveness.
• Movement and Slippage: Vibrations and thermal cycles can lead to gasket shifting, cracking, or displacement.

The LOCTITE® Liquid Gasket Advantage

LOCTITE® offers a range of liquid gasketing solutions that bond directly to metal surfaces, creating seals that are stronger and longer-lasting. Key benefits include:

• Total Surface Contact: LOCTITE® gaskets flow into every micro-crevice, ensuring a complete seal even on rough or irregular surfaces.
• No Shrinkage or Cracking: Liquid gaskets don’t degrade like rubber or fiber materials. They maintain integrity under temperature and pressure extremes.
• Increased Structural Rigidity: Once cured, LOCTITE® gaskets add mechanical strength to the joint, reducing micromovement and extending lifespan.
• Ease of Disassembly: Unlike many adhesives, LOCTITE® anaerobic gasketing allows for easy disassembly with simple tools, reducing maintenance time.

Case in Point: LOCTITE® 518™

One standout example is LOCTITE® 518™, a general-purpose anaerobic gasket ideal for rigid machined flanges. In real-world testing, it eliminated a 5% leakage rate in cast iron gearboxes where cut gaskets had previously failed. With faster curing and simplified application, it delivered consistent results and improved serviceability.

Conclusion

The future of effective sealing doesn’t lie in cutting out gaskets—it lies in forming them in place. LOCTITE® liquid gasketing technology represents a smarter, more durable, and more reliable solution for today’s industrial challenges. Say goodbye to leaks, downtime, and rework—choose liquid, and seal it for good.