Welcome to Imerys Performance Minerals


Fertilizer Imerys minerals make excellent coating agents preventing caking and dust

Imerys talcs and clays make excellent anticaking agents and inert fillers for fertilizers.

Anticaking agent

Complex and nitrogen-phosphate (NPK) fertilizers have a natural tendency to cake. Caking can occur during both storage (in bulk or in bags) and in transportation. Imerys talcs and clays make excellent anticaking agents, suitable for both prilled ammonium nitrate and granular fertilizers.

Imerys minerals:

  • Prevent fertilizer caking
  • Reduce water pick-up
  • Prevent the formation of hydrate crystal bridges
  • Prevent fertilizer deterioration and dust


Imerys clays are excellent fillers for calcium ammonium nitrate fertilizers.

Recommended grades:

  • Luzenac 2
  • Luzenac H60
  • Argirec

Technical support

Addition rates of mineral and mineral oil will depend on the fertilizer’s residual humidity, storage temperature, plasticity and particle size distribution. Our agricultural specialists have developed specific laboratory methods to determine the best coating solution for each type of fertilizer.

Please contact us to ascertain the optimum Imerys mineral and mineral oil dosage rates for your fertilizer.



We offer a full range of bespoke formulation and technical and process support services to help you match the right mineral grade to your application requirement.

Please contact us, we will be only too happy to help

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Agriculture & Animal Care