MOLYKOTE D-321R Dry Film Lubricant MoS2 Graphite Coating
MOLYKOTE D-321R Dry Film Lubricant MoS2 Graphite Coating
Product Overview
MOLYKOTE D-321R is an air-curing dry film anti-friction coating formulated with molybdenum disulfide (MoS2), graphite, an organic binder and solvent. It is designed to provide solid-film lubrication for metal-to-metal contact surfaces exposed to heavy loads and slow-to-medium movements.
Unlike conventional wet oils and greases, this dry film lubricant forms a lubricating coating on the treated surface, helping reduce friction, prevent stick-slip motion and minimize the accumulation of dust and dirt. It is suitable for selected industrial and automotive components where reliable lubrication, load-carrying capacity and a clean lubricating surface are important.
Under the stated curing conditions, the coating becomes touch-dry in approximately 5 minutes at 23°C. Curing can be accelerated to approximately 1 minute at 80°C, subject to the applicable product instructions and actual conditions.
Key Features and Benefits
Dry Film Lubrication: Forms a solid lubricating coating without relying on a persistent wet grease film.
MoS2 and Graphite: Combines molybdenum disulfide and graphite to support friction reduction and smooth movement.
Stick-Slip Prevention: Helps reduce irregular motion and friction-related noise in compatible sliding interfaces.
High Load-Carrying Capacity: Designed for heavily loaded metal-to-metal contact surfaces.
Dust and Dirt Resistance: The dry surface attracts less dust and dirt than many conventional wet lubricants.
Aging Resistance: Formulated to resist aging under suitable service conditions.
Fast Drying: Touch-dry in approximately 5 minutes at 23°C or approximately 1 minute at 80°C under the stated conditions.
Wide Temperature Capability: The supplied information states a temperature range of -180°C to +450°C; verify the applicable service limits for the cured coating against the current manufacturer technical data sheet.
Technical Specifications
Product Name: MOLYKOTE D-321 R
Product Type: Air-Curing Dry Film Anti-Friction Coating
Lubricating Solids: Molybdenum Disulfide (MoS2) and Graphite
Binder: Organic Binder
Carrier:Solvent
Curing Method: Air Curing
Touch-Dry Time at 23°C: Approximately 5 Minutes
Accelerated Drying at 80°C: Approximately 1 Minute
Stated Temperature Range: -180°C to +450°C
Primary Functions: Friction Reduction, Stick-Slip Prevention and Wear Protection
Typical Substrates: Suitable metal surfaces, subject to preparation and application requirements
Typical Applications
Metal-to-Metal Sliding Components
Suitable for selected sliding guides, bushings and other metal-to-metal interfaces operating under heavy loads and slow-to-medium movements.
Automotive Components
Can be considered for approved applications involving cylinder-head bolts, gear running-in and mirror-adjustment mechanisms where a dry lubricating coating is specified.
Switchgear and Electrical Equipment
Suitable for selected mechanical components in switchgear and high-voltage circuit breakers, subject to the equipment manufacturer's lubrication requirements.
Industrial Forming and Manufacturing
Can be used for approved applications such as cold steel extrusion and other forming processes requiring solid-film lubrication and friction control.
Aerospace and Wind Energy
May be considered for specific rotor-head emergency lubrication or other specialized mechanical applications where the product is explicitly approved by the equipment manufacturer.
Application and Surface Preparation
Prepare the Surface: Remove oil, grease, dust, rust and other contaminants using a suitable method recommended for the substrate.
Apply the Coating: Apply a uniform film according to the manufacturer's instructions, avoiding excessive coating thickness.
Allow Curing: Follow the recommended drying and curing conditions for the application.
Verify Performance: Confirm film adhesion, friction performance and compatibility under actual operating conditions before full-scale use.
Actual coating thickness, surface preparation, curing requirements and service life depend on the substrate, application method and operating environment. Consult the current technical data sheet for detailed instructions.
Handling and Storage
Use adequate ventilation during application because the formulation contains solvent.
Follow the product safety data sheet for personal protective equipment, flammability precautions and handling procedures.
Keep the container tightly closed when not in use and store it under the manufacturer's recommended conditions.
Avoid ignition sources where required by the applicable safety data sheet.
Dispose of unused product and solvent-contaminated materials in accordance with local regulations.
Why Choose MOLYKOTE D-321R?
MOLYKOTE D-321 R combines MoS2 and graphite solid lubricants in an air-curing coating designed for heavily loaded metal-to-metal interfaces. Its dry-film format helps reduce stick-slip and friction while limiting dust accumulation compared with many wet lubricants.
For industrial maintenance, automotive mechanisms and selected specialized equipment, it offers an alternative to conventional grease or oil where a dry lubricating film is preferred.
Important: Verify the stated temperature range, curing conditions and suitability for each application against the latest manufacturer technical data sheet (TDS) and safety data sheet (SDS) before use.
