Tri-State Technologies - Manufacturers Representative And Distributor Of Equipment And Instrument
Tri-State Technologies - Manufacturers Representative And Distributor Of Equipment And Instrument  
 Tri-State Technologies - Manufacturers Representative And Distributor Of Equipment And Instrument   Tri-State Technologies - Manufacturers Representative And Distributor Of Equipment And Instrument
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DuPont Krytox Oils & Krytox Greases

DuPont™ Krytox® – Oils & Krytox Greases

Krytox® oil and grease offer a unique combination of properties that provide exceptional performance, with solutions to your most challenging problems. Compared with other lubricants, only Krytox® oils and Krytox greases combine high-temperature performance, nonflammability, and chemical inertness under a wide range of conditions. Krytox® oils and greases increase the service life of critical components, allowing equipment manufacturers to extend warranties and manufacturing plants to reduce costly maintenance, while improving productivity by reducing component failure. Krytox oil and krytox grease can be a significant contributor to lowering the cost of doing business.


Krytox - Frequently Asked Questions

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Frequently Asked Questions - Krytox®

General Information

What is Krytox®?
Krytox® is a high-performance, non-flammable and chemically inert lubricant that is compatible with oxygen and has a strong resistance to aggressive chemicals. Krytox® provides extended life across a wide range of high-temperature applications.

Krytox® oil is a perfluorinated polyether. It is a liquid fluoropolymer, similar to liquid Teflon®. Greases are made with various viscosity grades of PFPE oil that are thickened with special PTFE grease thickeners to match the performance capabilities of the oils. Various additives for corrosion protection, extreme pressure conditions, or antiwear improvement are added to some of the grades.

Can Krytox® be used in a clean room environment?
A complete range of standard (1500 series) and extreme (1600 series) vacuum  oils are available as well as vacuum rated greases such as 240 AB, 240 AC 240 AD, L-150G and LVP.

Is Krytox® pressure sensitive?
No. Krytox® will increase in viscosity under pressure and compress slightly, but will not affect performance.

Can Krytox® be used in medical applications?
Krytox® products have not been approved for medical applications involving permanent or temporary implantation in the human body or permanent or temporary contact with internal body fluids or tissues.

General Physical Properties

What is the flash point of Krytox®?
Krytox® is nonflammable. It does not have a flash point because it will not ignite or burn.

What is the recommended temperature range for use of Krytox®?
Krytox® greases and Krytox® oils can be used from temperatures of -95° C (-139°F) up to 343°C (650°F) or higher with relubrication, depending on the grade. Some of the material will evaporate as the temperature rises but Krytox® will not burn or carbonize to form gummy deposits, thus avoiding the condition that typically causes equipment failures.

What is the density of Krytox®?
The density of Krytox® oil and Krytox® grease is approximately 1.9 kg/L, twice the weight of standard grease. This is important when filling bearings by volume. Hydrocarbon preservative oils need to be cleaned from new bearings before applying Krytox®. The preservative can carbonize and may cause premature failure.

What is the NLGI consistency of Krytox® grease?
Krytox® standard grease penetration is NLGI 2; other grades are available.

What is the coefficient of friction of Krytox® oils and greases?
We do not have a specific test for measuring the coefficient of friction of Krytox® oils and greases. However, we have run the 4-Ball Wear Test (ASTM 2266) for many Krytox® products. From this test, a coefficient of friction of 0.08 to 0.12 for Krytox® is calculated by dividing torque by load.

What is the dropping point of Krytox®?
Krytox® greases are thickened with PTFE. Dropping point test results (ASTM D-566 and ASTM D-2265) can be confusing or misinterpreted with PTFE-thickened greases. The test is used to determine the “dropping point” (melting point) of a grease, which is the point at which the thickener begins to soften and release base oil. Testing with several different PTFE thickeners shows that a drop of clear oil will be released or separated at around 210°C (410°F) with PTFE-thickened greases. The thickener does not melt until the 320°-335°C (608°-635°F) range. The useful temperature range for the grease is dependent on the base oil.

General Chemical Properties

Does Krytox® oxidize?
PFPEs do not oxidize like hydrocarbons and other synthetics. Because of the PFPE's fluorinated structure, which is inert and nonreactive, they do not oxidize and break down.


How long will my bearings (or equipment) last if I use Krytox®?
We cannot guarantee the life of any equipment in which Krytox® is used because it is dependent on the application and because Krytox® performance lubricants tend to be applied in the most extreme conditions. Different temperatures and loads will affect performance as well as the amount of solid contaminants that get into the grease. We can safely predict that Krytox® will give you the longest performance of any lubricant.

How do I clean off Krytox®?
The good news is that you really do not have to clean off Krytox® completely before relubricating. You only need to clean off any solid particulate that is embedded in the grease. If you must clean off the grease completely, DuPont publishes a list of acceptable cleaners.


Is Krytox® compatible with various seal materials?
Krytox® is compatible with all seal materials. It is chemically inert.

Is Krytox® compatible with plastics and elastomers?
PFPEs are compatible with all plastics and elastomers. Plastics and elastomers are unchanged and can be used up to their standard operating limit.

Can you mix Krytox® with another grease?
We recommend that you do not mix greases. Krytox® greases will not react with the other grease, but they will not mix either and could degrade grease performance.

Is Krytox® compatible with aluminum?
There is no reactivity with aluminum at temperatures below 288°C (550°F), but is not recommended for use in equipment that has bearing surfaces made of aluminum.

Can Krytox® greases be mixed?
What happens when they are different viscosities?
Most Krytox® greases can be mixed with each other without concern for reactivity of the oils, thickeners or additives. However, it is not wise to mix different grades, as you can dilute the additives or change the average viscosity of the base oil by doing this. If you mix a grease with a lower viscosity base oil into a higher viscosity grease, the average viscosity will drop and the oil might not properly support the load. Please contact DuPont before mixing greases of different grades.

Shelf Life

What is the shelf life of Krytox®?
Standard Krytox® grease and oil lubricants have an indefinite shelf life if unopened and stored in a clean, dry location. Unopened containers of these fluids have shown no change in properties after ten or more years of storage at ambient temperature. Some specialty products containing soluble additives should be used within three years of manufacture to get the maximum benefit. Currently XP1A series oils, 2A series greases, GPL 226 SR, GPL 227SR and the XP 1500 vacuum pump fluids are the only products with a shelf life.

Opened containers could be contaminated with moisture or dirt and should be used with caution if their storage history is unknown. If they are clean, uncontaminated, and have been stored so that oil loss is minimized, they are safe for use because the oil and thickener do not degrade with time.

Some oil will separate from the grease after sitting for long storage periods and will tend to accumulate on the surface of grease kept in jars. This does not affect the performance of the grease and can be mixed back into the grease by hand stirring.

Safety and Environmental

Is Krytox® safe for oxygen service?
Yes. It passes all oxygen impact and reactivity tests and is recommended for oxygen service.

Is Krytox® hazardous?
No. Krytox® is a very safe lubricant to use. All Krytox® products are chemically inert. Krytox® oils are even used in cosmetics and the greases as barrier creams. The materials decompose at temperatures above 343°C (650°F); some of the decomposition products are potentially hazardous.

Does Krytox® contain any VOC, Volatile Organic Compounds?
Krytox® does not contain any Volatile Organic Compounds. Krytox® is made of fluorine, oxygen, and carbon. It does not contain any hydrogen.


Does Krytox® contain synthetic hydrocarbon?
No. Krytox® oil is a synthetic fluoropolymer and the grease is the oil thickened with an ultra low molecular weight PTFE.

Is Krytox® used as an additive to combustion engine oils?
Krytox® is not useful as an ingredient in oil additives or oils used for internal combustion engines because it is inert and will not mix with the oil.

Does Krytox® contain silicone?

Is there any moisture in Krytox®?
No. Krytox® grease is moisture-free. We use no water in its manufacture.

What are the metal levels in Krytox® oils and greases?
Krytox® oils and greases contain only carbon, fluorine, and oxygen. An analysis has shown no detectable levels of metals, hydrocarbons, or any other compounds.

Product Comparisons

What is the difference between regular Krytox® and Krytox® RFE?
Krytox® RFE is a joint program between Loctite and DuPont. Krytox® RFE is formulated and made exclusively for Loctite. It is only available through Loctite and its authorized distributors.

Food Lubricants

Is Krytox® USDA H-2 certified?
Our Krytox® GPL (general purpose lubricants) have an USDA H-2 rating. H-2 is for lubricants with no contact.

These compounds may be used as lubricants, release agents, or antirust films on equipment and machine parts or in closed systems in locations in which there is no possibility of the lubricant or lubricated part contacting edible products.

Is Krytox® Food Grade Approved?
Our Krytox® Food Grade Lubricants (FG series) are USDA H-1 approval and have been determined by the NSF to be in compliance with FDA 21 CFR, Part 178, Section 178.3570. The NSF Registration Guidelines for Proprietary Substances and Nonfood Compounds (2002) are available at Registration status may be verified at any time via the NSF web site.

These products are acceptable as lubricants with incidental food contact (H-1) for use in and around food processing areas. Such compounds may be used on food processing equipment as a protective antirust film, as a release agent on gaskets or seals of tank closures, and as a lubricant for machine parts and equipment in locations in which there is a potential exposure of the lubricated part to food.

Military & Company Specs

Does Krytox® grease meet MIL specs?
Yes, Krytox® 240AZ (NLGI 1) grease meets MIL spec MIL-PRF-27617 Type I, Krytox® 240AB meets Type II and 240AC meets Type III.


What is the proper method for disposing Krytox®?
Krytox® oils and greases are not considered hazardous wastes as manufactured under the EPA RCRA guidelines. Treatment, storage, transportation, recycling and disposal of these products must be in accordance the applicable federal, state/provincial, and local regulations. State/provincial and local regulations may impose waste management requirements, which are more stringent than federal standards. You must review the regulatory requirements specific to your location. Click here for more info on disposal.


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