Gasket Sealants/Flange Sealants

Save on cost and allow for greater design flexibility in gasket sealing

Gasket sealants are used to prevent leakage of fluids or gasses by forming impervious barriers. They cure in the presence of metal and the absence of air to form a durable seal between components.

Gasket sealants also eliminate corrosion and provide an instant, low-pressure seal on an assembly after full cure. Gasket sealants will not shrink, crack or relax, and resist displacement better than conventional gaskets.

Choosing a Gasket Sealant or Flange Sealant

LOCTITE® gasket sealants act as both a gasket sealant and a gasket adhesive between two flanges. The liquid sealant completely fills the space between the flange surfaces, thereby preventing the escape of gaseous or fluid materials in composite machine parts or pipe connections. At the same time, adhesion to the flange surfaces enhances the strength of the assembly.

Gasketing Applications for Automotive Manufacturing

Benefits of LOCTITE® Gasket Sealants

With Henkel gasketing sealants, customers can be sure of:

  • No shimming effect; controlled tolerances mean no need for re-torquing
  • All voids filled, reducing the need for a fine surface finish of flanges
  • Parts can be disassembled easily even after extended service
  • Resistance to high pressure when fully cured
  • Widely used as formed in place gaskets that produce leak proof seals between mating flanges
  • Prevents leakage of moisture, gasses, fluids, or contaminants
  • Remains a liquid when exposed to air, but cure when confined between mating flanges
  • Provides a low cost, high quality alternative to molded rubber, paper, metal and other hard gaskets

Henkel gasket sealant products can be applied manually or by automated methods such as tracing, stenciling, and screen-printing. These sealants are equally effective on a variety of metal surfaces, including aluminum, and most are resistant to gasoline, oil, and other solvents.

Types of Flange Gaskets

Gasketing sealants can be used with many different types of materials including metals, wood, plastic, rubber, ceramics, glass, and even concrete. The type of sealant selected for a specific application depends on the material to be sealed, environmental conditions, temperature, and operating pressures in the system.

There Are Three Types of Flange Gaskets:

1. Conventional pre-cut compression gaskets are made from paper, rubber, cork, metal or other materials.

2. Formed-in-Place (FIP) gaskets are applied as a liquid sealant to one of the flange surfaces before the parts are assembled. After assembly, the FIP gasket spreads and cures between the flanges, filling gaps, scratches and surface irregularities to provide a durable seal.

A formed in place gasket on a machine part.

3. Cured-in-Place (CIP) gaskets are liquids that are applied by machines. These machines dispense the gasket material in precise beads to one of the flanges. The material is cured by ultraviolet (UV) light to form an elastomeric material with adhesion to the flange surface. Sealing is achieved through compression of the cured gasket during flange assembly.

A cured in place gasket being applied to a part.

Gasket Sealants Frequently Asked Questions

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