Opteon SF79 (3M™ Replacement Fluid 71DA, 71DE, 72DA and 72DE) – TMC Industries, Inc.

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Opteon SF79 (3M™ Replacement Fluid 71DA, 71DE, 72DA and 72DE)

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(3M™ Replacement Fluid 71DE, 72DA, 72DE and 73DE)
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Opteon SF79 HFO Based Next Generation Low GWP Precision Cleaning Fluid 

Opteon SF79 is a high solvency cleaning agent developed to replace nPB and in response to worldwide market demand for safe, nonflammable, and low environmental impact products for cleaning applications. Typical applications for this product include degreasing, precision cleaning, defluxing, silicone removal, 3D metal parts cleaning (Used in MarkForged Metal X 3D printer Wash-1).  Superior cleaning performance with best solvency power in its class (Kb value = 103)


  • Nonflammable
  • Low odor and toxicity
  • Designed to clean a wide range of soils
  • Fast drying with an optimum boiling point (47 °C [117 °F]), allows cleaned parts to be processed and used immediately 
  • No surfactants needed: Removes extra washing steps to achieve residue-free cleaning
  • Compatible with a broad range of metals, plastics, and elastomers
  • Chemically and thermally stable
  • Zero ODP and low GWP (< 15 GWP)
  • Recyclable and reusable: Reduces cost of ownership and environmental footprint 
  • Low surface tensions
  • Allows for the continued use of existing equipment (no or minimal equipment upgrade necessary)
  • High soil loading capacity boosts productivity by reducing equipment downtime associated with solvent change-outs
  • Easy to handle, easy to store
  • REACH, F-Gas, and SNAP compliant
  • Not a HAP (Hazardous Air Pollutant)
  • Nonflammable for facility safety
  • Hostile to pyrogens

Physical Properties (@ 25°C (77°F))

Boiling Point


Liquid Density

1.279 g/cm3

Liquid Kinematic Viscosity

0.03251 cm2/s

Liquid Specific Heat

1.092 kJ/kg-K

Liquid Thermal Conductivity

127 mW/m-K

Vapor Pressure

44.1 kPa

Heat of Vaporization

226 kJ/kg

Flash Point, CC, ASTM D56


Flash Point, OC, ASTM D1310


Vapor Flammability, ASTM E681

7.25-15.25 vol %

KB Value, ASTM D1133


 Typical Applications

  • Oil and grease removal
  • Precision cleaning
  • High solvency defluxing
  • Silicone removal
  • Vapor-Degreasing
  • Cold cleaning
  • 3D Metal Printing


Opteon SF79 represents a safe alternative to chlorinated solvents such as HCFC-225, 141b, TCE and nPB, which are currently being phased out due to health and environmental risks. The safe exposure limit for nPB has been measured at 5-10 ppm industry authorities even recommend further reducing to 0.1 ppm whereas Opteon SF79 has a safe exposure limit of 201 ppm, which is comparable to everyday rubbing alcohol.


The cleaning power of Opteon SF79 has been measured up to a 100 KB value, which is a cleaning power standard. Opteon SF79 can match nPB and other common formulations ounce for ounce, providing all their solvency benefits, while offering a superior toxicity profile.


While Opteon SF79 is a safe, effective, and environmentally friendly nPB replacement, nPB requires acid acceptance testing, stabilizer maintenance, and solvent air monitoring for safe and effective use. These additional formulations and processes increase your overall cost of using nPB making Opteon SF-79 an even better, safer value.

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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