TMC-40 (3M™ FC-40 Drop in Replacement) – TMC Industries, Inc.

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TMC-40 (3M™ FC-40 Drop in Replacement)

Out of stock
Gross leak, Dielectric testing and Heat Transfer
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TMC-40 fluorinated liquid is a colorless transparent perfluorinated chemical that is inert and has high dielectric strength and thermal conductivity. It also has low surface tension. It is mainly used in semiconductor manufacturing fabs as a heat transfer fluid. Other uses include power electronics, high-performance computing, heat transfer for data centers, and aviation electronics. The operating temp range is - 57°C to 166°C. It is primarily used in etching equipment, ion implantation equipment, testing, and other equipment. Because TMC-40 is a single component, it resists degradation over time.


Electronic Testing, Gross Leak Testing, Heat Transfer, Dielectric Bath, Semiconductor Cooling, Thermal Shock Testing

TMC-40 is a direct replacement for 3M™ FC-40.

Physical Properties


Clear, colorless liquid

Molecular Weight

650 (g/mol)

Boiling Point

165 (°C)

Pour Point

-57 (°C)

Vapor Pressure

290 (Pa)


1.856 (g/cm3)

Kinematic Viscosity

2.2 (cSt)

Absolute Viscosity

4.1 (cP)

Liquid Specific Heat

1100 (J/Kg-1°C-1)

Liquid Thermal Conductivity

0.065 (W/m °C-1)

Dielectric Constant


Volume Resistant

~1012 (Ohm-cm)

Coefficient of Expansion

0.0012 (°C-1)

Refractive Index


Surface Tension

16   (mN/m)

Dielectric Strength


Ozone Depletion Potential


Flash Point



Toxicity Properties

TMC-40 is virtually non-irritating to the eyes and skin. The product also demonstrates very low toxicity and was not mutagenic. Please see the SDS of TMC-40 for detailed information.

Materials Compatibility

TMC-40 is compatible with most metals, plastics, and elastomers, please contact TMC Industries, Inc. for further recommendations and technical assistance.

Recycle and Reclaim Options

TMC Industries Inc. reclaim service provides significant savings over the cost of new fluid and helps protect the environment by drastically reducing the amount of your waste stream.

Reduce your hazardous waste disposal and achieve better environmental stewardship. TMC Industries, Inc. properly disposes of the contaminants.

Quality Assurances

We guarantee our reclaimed solvents to have new qualities and performance capabilities. To support our confidence, pre- and post-processing analytical data accompanies each shipment.

Save on Disposal Costs

Reduce your hazardous waste disposal. Have TMC Industries reclaim your contaminated fluids to their original state and purity and return them to you at about 1/3 the cost of replacing them with new fluids.

Shipping Policy

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

Shipping Time -- Most orders received before 3:00PM Central Time will ship the same day, provided the product ordered is in stock. Most orders received after 3:00 PM will ship the next business day. Orders are not processed or shipped on Saturday, Sunday or major US holidays.

We cannot guarantee when an order will arrive. Consider any shipping or transit time offered to you by the carrier as an estimate. We encourage you to order in a timely fashion to avoid delays caused by shipping or product availability.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

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