Seed lubrication
Flow additive for seeding
Also known as: Graphite for seed · Seed meter lubricant · Flow additive for planters · Talc and graphite for treated seed
[ Technical summary ]
Seed treated with fungicide or insecticide coatings becomes tacky, and its passage through the planter meter stops being regular, which alters seeding density. Graphite is added to the seed hopper in small quantities to reduce that friction: it coats the grain, improves flowability, and reduces wear on meter components. It is common practice in precision mechanical planting.
[ Problem it solves ]
Keep treated seed flowing evenly through the meter, avoiding the variation in seeding density caused by coating tackiness.
Operating conditions
- Seed treatment
- Flow improvement
- Mechanical seeding
When it is suitable
- The seed is treated and tends to stick
- The meter delivers irregular seeding density
- Wear is seen on meter components
- The planter is a precision unit requiring constant flow
When it may not be suitable
- The planter manufacturer specifies a different flow additive
- The dose cannot be controlled and excess would affect the meter
- The flow problem comes from moisture in the seed
Process challenges
- Irregular flow
- Sticking in feeders
- Seeding-equipment wear
Advantages
- Flow improvement
- Dry lubrication
- Specific presentations
Limitations
- Not a hydrodynamic oil lubricant
- May stain light-colored surfaces
- Performance depends on surface preparation and reapplication
[ Critical selection variables ]
These variables define the grade and the geometry. Actual values are confirmed against the grade datasheet.
- Dosage and application frequencyDecisive
- Particle sizeDecisive
- Application methodRelevant
- Humidity and ambient conditionsRelevant
- Food contact or sanitary requirementsRelevant
[ Required material properties ]
Properties that guide selection. Numerical values come from each grade's datasheet.
Critical properties
- Friction coefficient
- Particle size distribution
- Self-lubrication
- Purity
Secondary properties
- Dispersibility
[ Related ]
[ Frequently asked questions ]
View all FAQsTechnical content reviewed by ESGRAF — Last reviewed: September 8, 2026
[ Quote ]
Need the right specification—not just material?
Tell us your application. Engineering response in under 24 hours.