Improving Flange Sealing and Gasket Performance

Featured Product from Henkel Corporation - Industrial

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Improving Flange Sealing and Gasket Performance with Liquid Gaskets


It’s a fact of life. While surface irregularities are the most frequent cause, other causes include:

  • Gasket relaxation – compression set
  • Gasket displacement/extrusion
  • Flange bowing
  • Flange deformation


No matter what the cause, there are two ways LOCTITE® can help.

The Issues with Mechanical Gaskets
  • Over time, they lose their elastic properties and become less resilient
  • Continual pounding of the gaskets by the flanges causes a decrease in the gasket thickness, which can lead to leaks 
  • Gaskets can be squeezed out between flanges by a combination of compression and internal pressure 
  • Over-tightening of cover plates and bolt-holes can easily break/distort cut gaskets
  • Finding replacement gaskets for older machinery can be impossible
  • Gaskets do not always store well and can become brittle or get damaged while in storage, and keeping the right one for each equipment application can get costly


The Solution: LOCTITE Liquid Gaskets

All LOCTITE gasket solutions provide for reliable, leak-proof seals

  • Will not settle, slip or relax - maintains fastener tension
  • Fill all voids and gaps - preventing leaks and weeping
  • Distribute stress evenly and will not crack or tear
  • Require no re-torquing
  • Prevent corrosion ensuring ease of disassembly
  • Have excellent chemical resistance, high blowout resistance and are easy to apply


Flexible, high-strength anaerobic gasketing material for use on rigid iron, aluminum and steel flanged mating surfaces. LOCTITE 518 features:

  • Greater tolerance of surface contaminants for a more consistent cure
  • Better flexibility for thinner, lighter weight flange designs
  • Better gap cure seals flanges with reduced machining tolerances
  • High performance on inactive metals without an activator


Anaerobic or Silicone? How to Pick the Right Gasket Sealant

Knowing the differences between the two major types of LOCTITE gasket sealants can help you select the right one for your application.

Just Select:

  • Your flange type
  • The gap size to be filled
  • The temperature resistance required

Anaerobic Adhesives
Prevent metal components from loosening because of vibration and protect joints from corrosion or rust 
Anaerobic adhesives work by completely filling gaps between components. They are typically used to augment the seal or holding force of a mechanically joined assembly. LOCTITE®
anaerobic adhesives include threadlockers, thread sealants, retaining compounds, and gasket sealants.

How LOCTITE® Anaerobic Adhesives Work
Anaerobic adhesives remain liquid until isolated from oxygen in the presence of metal ions. Though anaerobic applications differ widely, in most cases the adhesive provides high shear strength and temperature resistance. Anaerobic adhesives fixture in minutes at room temperature and fully cure within 24 hours. Full cure of anaerobics may be achieved more rapidly using short-term exposure to heat (e.g. 30 minutes at 120°C).

Additional ResourcesAnaerobics White Papers


Featured Literature


Why Adhesives?
Attention sign manufacturers, your sign assembly just got better! Our extensive product portfolio of 18 adhesives is the ultimate solution for your sign application needs. From construction to installation, we have the right product for every application.

Adhesives and sealants have several beneficial uses in the sign industry. Use adhesives to:

  • Join Dissimilar Substrates
  • Distribute Stresses Evenly
  • Fill Large Gaps
  • Seal and Bond
  • Reduce Labor Costs (welding vs. general labor)
  • Prevent Galvanic Corrosion
  • Absorb Energy
  • Eliminate Drilling/Tapping, Weld Read-Through and Mechanical Fasteners
  • Maintain long-term sealing performance
  • Look Better (Aesthetics)


Adhesives vs. Tapes: What’s the Difference?

Liquid adhesives are superior to tapes for many reasons. Here are a few:

  • Repositionability – Tapes are difficult to reposition, which can lead to scrapping material. Liquid adhesives are easy to reposition, reducing waste.
  • Fast Assembly – Liquid adhesives can be applied much faster than tapes, saving time in assembly operations.
  • High Green Strength – As they cure, liquid adhesives become stronger than tapes.
  • Preventing Creep – Liquid adhesives prevent bond lines from separating over time, regardless of how much weight is applied.


Why Henkel?
New Technologies

We have new and improved technologies that are well suited for the sign industry:

Universal bonders and TEROSON® MS 5555 NA low cost SMP are both new to the sign industry. We feature two universal bonders and five different SMP products. These products aren’t used by our competitors. At Henkel, we are always thinking forward. We target specific applications where we can succeed and excel.

Outstanding Customer Service
LOCTITE® has excellent technical customer support teams. Our engineers will support your sign manufacture and installation through our extensive testing and development laboratories. We are here for you, through every step of your sign manufacturing, to make the process easier through both our products and our people.