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Neolube® No. 1 is a dry film lubricant used extensively at nuclear power generating plants and other nuclear facilities as an anti-seize compound, thread lubricant, and for lubricating moving parts and rubbing surfaces.

The composition of this material is 99% pure furnace graphite particles, a thermoplastic resin, and isopropanol. The material has excellent radiation resistance and high chemical purity. The thin, dry, non-corrosive film of NEOLUBE® No. 1 prevents seizing, fretting, and galling and resists abrasion. It is easy to apply by spray, dip, or brush and has excellent adhesion after a fast air dry. The dry film of NEOLUBE® No. 1 will not migrate and is unaffected by frost.

NEOLUBE® No. 1 has satisfied the stringent requirements for lubricating the internal and auxiliary equipment mechanisms of commercial and naval nuclear reactor systems. NEOLUBE® No. 1 provides non-corrosive, dry adherent lubrication for metal parts with limited clearances in applications where control of impurities is required. In addition, NEOLUBE® No. 1 resists abrasion and effectively lubricates moving parts, rubbing surfaces, and threaded parts for easier assembly, trouble-free operation, and non-destructive disassembly.  

NEOLUBE® No. 1 is NOT RECOMMENDED FOR LUBRICATING THREADS IN THE REACTOR PRIMARY CONTAINMENT AREAS, where operating temperatures for the fittings are greater than 400°F. NEOLUBE® No. 1260 is recommended for containment and/or secondary side in nuclear applications. NOT RECOMMENDED FOR USE IN OXYGEN SYSTEMS.

A Certificate of Quality Conformance and Analysis is available for each lot upon request.

Physical and Chemical Requirements


Total Solids Content, weight percent

Graphite Content, percent of total solids

3.3% 0.50%

75% 5%

Particle size, microns

Maximum dimension of 90% of the particles

Maximum dimension of any particle

 4 Microns

10 Microns

Ash, weight percent, maximum on total solids

Fluorine, parts per million, maximum on total solids

Chlorine, parts per million, maximum on total solids

Sulfur, parts per million, maximum on total solids

Lead, parts per million, maximum on total solids


20 PPM

200 PPM

200 PPM

150 PPM

Film Properties (regular & irregular surfaces):




The coated surface shall be dry and shall not become exposed when subjected to light abrasion.

Film continuity shall not be broken, metal surfaces shall not be exposed.

Dry, non-oily.


Characteristic of isopropanol, no odor of halogenated solvents shall be detected.


Mercury:  Instruments and equipment containing mercury or mercury compounds were not used in the manufacture and packaging of the lubricant, nor testing and inspection unless samples were discarded after the test. During the manufacturing processes, tests, and inspection, NEOLUBE® No. 1 did not come in contact with mercury, any of its compounds, or any mercury-containing devices employing a single boundary of containment. Compounds containing boron were not used in cleaning, processing equipment, or containers. There is no intentional addition of low melting point metals such as lead, bismuth, zinc, mercury, antimony, cadmium, tin, silicon, gallium, indium, or arsenic to this product, nor of copper or silver. MeOH is not a component of NEOLUBE® No. 1. NSF does not approve this product for drinking water applications.  

Physical Properties of NEOLUBE No. 1

(As Supplied)

  • Lubricant: Processed micro-graphite Shelf Life No limit in a closed container
  • Binder: Thermoplastic Resin Flash Point 52°F (11°C)
  • Diluent: Isopropanol Color Black
  • Consistency: Liquid Solids Content 3.30% 0.50%
  • Density: 6.6 lb./gal (0.791 kg/l)

(As a Cured Coating)

  • Service Temperature: 400°F (204°C)
  • Intermittent Temperature: 850°F (454°C)
  • Coefficient of Friction: 0.15 (Static)


NEOLUBE® No. 1 is supplied in a ready-for-use form conforming to the requirements of MIL-L-24131C. If the application requires further dilution, add isopropanol while mixing uniformly.


Substrates should be clean and dry before application. A solvent wipe and air drying are usually sufficient. For critical applications requiring maximum adhesion, mechanical or chemical pretreatment such as grit blasting, phosphating, anodizing, or etching is recommended.


Mix uniformly before using. Apply with the brush in cap applicator or by conventional spray, brush, or dip methods.

Cure Time

Material air dries in approximately 5 minutes, depending on temperature and humidity.  


NEOLUBE® No. 1 is packaged in 2-ounce and 8-ounce non-halogenated plastic bottles with a brush in cap applicator.


Employ the customary safeguards in storing, handling, and applying flammable materials of this type. Use adequate local exhaust ventilation if the product is sprayed. Avoid prolonged contact with eyes, skin, and clothing. (See the Safety Data Sheet for proper first aid instructions.)  Containers must be tightly resealed to prevent evaporation and contamination.

Qualification Approval

The approving organization is the Naval Ship Engineering Center, Hyattsville, Maryland, 20782. The approval letter date is 21 June 1974, Test Report Number (QPL) 10744.


The data contained herein are furnished for information only and are believed to be reliable. We cannot assume responsibility for the results obtained by others over whose methods we have no control. It is the user=s responsibility to decide the suitability for the user=s purchase of any production methods mentioned herein and to adopt such precautions as may be advisable for the protection of property and persons against any hazards that may be involved in the handling and use thereof.  In light of the foregoing, Huron Industries, Incorporated specifically disclaims all warranties of merchantability or fitness for a particular purpose arising from the sale or use of Huron=s products. Huron Industries, Inc. specifically disclaims any liability for consequential or incidental damages of any kind, including lost profits. The discussion herein of various processes or compositions is not being interpreted as representation that they are free from domination of patents owned by others or as a license under any Huron Industries=s patents that may cover such processes or compositions.  We recommend that each prospective user test the proposed application to determine its suitability for the purposes intended before incorporating any product or application in its manufacturing process using this data as a guide. This product may be covered by one or more United States or foreign patents or patent applications. The recording of false, fictitious, or fraudulent statements or entries on this document may be punished as a felony under Federal Statutes. NEOLUBE® is a Registered Trademark of Huron Industries, Inc.

With proper safety and handling practices, Neolube No. 1 is a great product for your industrial applications. It has been approved for use by the Naval Ship Engineering Center, in Hyattsville, Maryland, and has passed stringent requirements for lubricating applications of commercial and naval nuclear reactor systems. Call Huron Industries today to find out more information.