LOCTITE^® Vacuum Impregnation

Resins and fully-automated equipment impregnates and seals metal and electronic automotive parts against harsh environmental elements

Contact our experts to discuss your impregnation service needs:

World map indicating Henkel's global impregnation centers

Global Impregnation Service Centers

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European Impregnation Service Centers

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The Value of Vacuum Impregnation

Vacuum impregnation methods ensure metal and electronics parts of vehicles are fully sealed against fluids, gases and other external influences and ready for just-in-time assembly. After impregnation, all parts are clean, free of corrosion or oxidation, and are ready for use without post-treatment. LOCTITE^® vacuum impregnation solutions provide resins that cure to an impermeable thermoset polymer. This makes it possible to permanently seal pores or leakpaths to enable quality lightweight, thin-walled die-casted parts or electronic components.

Impregnation Process

With an unmatched portfolio of LOCTITE^® products and our fully automated vacuum impregnation methods, we can ensure that customers no longer face the negative effects of porosities, including cost of scrapping, loss of production, dissatisfied customers or even lost business. Our state-of-the-art impregnation process technology gives you a permanent and reliable sealing solution to the problems of porosities and leakages.

Step 1: Vacuum

Icon symbolizing Step 1 of the metal vacuum impregnation process

Vacuum impregnation equipment includes dry and wet vacuums used to prepare the impregnation resin. The absence of liquid within the dry vacuum method ensures no interference with degassing the pores. Within the wet vacuum method, penetration of the impregnation resin into the part takes place at atmospheric pressure, enabling rapid processing. Once prepared, the impregnation resin fills porosities, shrinkage cavities, capillary pores and cracks to ensure resistance to external influences.

Step 2: Centrifuge

Excess sealant is removed from part surfaces through a drip-off and spin process; the most effective method for removing excess sealant with no risk of damage to the parts, while requiring very little time.

Step 3: Wash

Red arrow icon referring to Step 3 of the metal impregnation process

Parts are washed, using the oscillator for agitation, and the centrifuge prepares for the rinsing step. Compressed air agitation in the water also may be used.

Step 4: Rinse

Parts are rinsed and the centrifuge prepares for the curing step. When exposed to the activator rinse, sealant at the pore entrances will cure quickly, creating a “plug” that prevents remaining liquid sealant from escaping while it continues to cure slowly by the anaerobic system.

Step 5: Cure

Red icon showing step 5 of the vacuum impregnation process where parts rinsed and cured

Parts are soaked within a final rinse tank of water at 90°C (metal impregnation) or 50°C (electronic impregnation), removing the activator solution, and quickly drying and curing the part.

Vacuum Impregnation Services Options

Henkel offers on-site impregnation service centers, which includes the temporary installation of a small customized impregnation center directly on their site. Capital investment, products, process controls and labor belong to Henkel, directly on-site for fast and high-quality impregnation.

For customers that do not require a service center on-site, all of the advantages of Henkel sealing solutions are available from our external impregnation service centers - conveniently located around the world.

The Benefit of Impregnation

Process Optimization

Fast Processing time and high capacity for impregnating high volume parts

Performance

Fully automated system ensures constant high-quality performance

Cost Reduction

Designed for broad spectrum of parts without costs for specific fixtures

Sustainability

Space-saving footprint (645 sq. ft./60m²)
Environmentally-friendly: recycling performance drastically reduces resin and waste water

Safety & Comfort

Enclosure and extraction ensures low noise pollution and emission to protect employees and hardware
Fully automated system ensures high safety level

Vacuum Impregnation Equipment Options

A variety of equipment options are available for casting impregnation methods, including the LOCTITE^® Circular Sealing System, the LOCTITE^® Modular Sealing System and the ability to create customizable equipment, based on customer needs and specifications.

LOCTITE^® Circular Impregnation System (CIS)
Well suited for high-volume, fully automated impregnation solutions, the LOCTITE® Circular Impregnation System functions in five steps, beginning with parts placed in processing baskets and positioned in the CIS loading station.

LOCTITE^® Modular Sealing System
Offers production flexibility at an affordable investment price. Can function as a manual system or fully automated robotic system.

FARASEAL: Electrical and Electronic Vacuum Impregnation

The hand of a butler underneath an electronic component and bit of red wire

Microscopic voids are inherent in many electronic assemblies, particularly where metals and plastics are assembled together. Our FARASEAL process seals even microscopic gaps and leak paths in critical electrical and electronic components, permanently sealing them from moisture, solvents, fluxes and other corrosive agents.

FARASEAL Applications:

Connectors
Sensors
Plugs
Coils and solenoids
Pastic housings
Plastic covers
Over molded electronics
Cables
Wire harness

Die Cast Vacuum Impregnation

A butler holds a train with an LOCTITE impregnated powertrain component

Metal casting impregnation allows you to make use of parts that would otherwise have to be scrapped due to structural defects. Our products have been developed to deliver consistently clean, leak-proof and sealed parts ready for just-in-time assembly.

Casting Impregnation Applications:

Engine blocks
Cylinder heads
Engine covers
Transmission cases
Compressor components
Cooling/oil pumps
Crank case
Torque converter housings
Oil pans

Resources for Impregnation

Introduction to Impregnation Terminology

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Vacuum Impregnation for Electronic Components

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Vacuum Impregnation for Cast Metal Parts

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Seal of Quality: High-Quality Impregnation Products and Services

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Impregnation Fluid Compatibility Chart

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Permanent Sealing for Automotive Electronics

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For Information on Henkel's LOCTITE^® Impregnation Solutions

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LOCTITE^® Vacuum Impregnation

Page Content

Contact our experts to discuss your impregnation service needs:

Global Impregnation Service Centers

European Impregnation Service Centers

The Value of Vacuum Impregnation