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IMPREX is the leader in Vacuum Pressure Impregnation from manufacturing VPI equipment to in-house impregnation of castings, powdered metal parts, and electronic components. Our reputation for excellent quality and service is well-known in the industry, and sets us apart from the competition.

Since 1958, Imprex has supplied custom vacuum impregnation equipment to some of the largest companies in the U.S. and worldwide. And our job shop for local Midwest customers offers in-house porosity sealing with high-quality results and quick turnaround.

Learn more about our VPI equipment and services, and let us know how we can help you with your vacuum pressure impregnation and porosity sealing needs.

IMPREX VACUUM PRESSURE IMPREGNATION (VPI) SYSTEMS

Imprex has been designing and fabricating custom Vacuum Pressure Impregnation equipment for installation since 1958. Made in the USA, we build VPI systems in our ASME certified Fabrication Shop, and ship them for installation all over the world.
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VPI SPARE PARTS

The Spare Parts Department offers a comprehensive range of quality spare parts to keep your VPI equipment operating efficiently. To that end, our spare parts and equipment meet all specifications and certification requirements.
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imprex vpi components
Imprex vacuum pressure impregnation

IMPREX PARTS PROCESSING

Our Job Shop offers quick turnaround for porosity sealing in metal castings, powdered and sintered metal parts, and electronic components. High-quality impregnation is the solution to eliminate porosity, and turn leakers into usable parts.
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WHAT CAN BE IMPREXED?

Any metal castings that need to undergo drastic temperature changes, moisture, vibration, or hydrostatic, hydraulic, or pneumatic pressure can be impregnated. Imprex’s vacuum pressure impregnation systems can seal porosity in automotive parts, motors, generators, coil windings, transformers, pumps, electronic equipment, and more.
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imprex vacuum impregnation parts
imprex vacuum pressure impregnation systems

WHAT CAUSES METAL CASTING DEFECTS?

If small gas bubbles are trapped while a metal casting is still liquid, voids can form when the metal cools. These voids in the metal are called porosity, and cause leakage when the casting is pressure-tested. Imprex impregnation seals porosity and makes parts pressure-tight.
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