Welcome to Imerys Performance Minerals

Other Curing Systems

Other Curing Systems We offer specific product solutions to suit each type of chemistry

Imerys has a large portfolio of engineered minerals which are ideally suited to boost the properties of one-and two-component (1C & 2C) where curing mechanisms include catalyst cured, thermal curing, UV curing and solvent evaporation.  Our minerals benefit multiple applications used for difficult-to-bond substrates such as metals and many plastics. 

We offer specific product solutions to suit each type of chemistry: silicone, polyurethane, polysulfide, hybrid polymer and epoxy systems. 


High-performance silicone sealants

Imerys supplies several different calcium carbonate, mica and perlite products for silicone sealants depending on targeted properties in terms of extrusion rate and mechanical properties. 

  • Socal® ultrafine precipitated calcium carbonate (PCC) confer the right balance of extrusion rate and mechanical properties at high incorporation throughput. Our Socal grades are recommended where resistance to high temperatures is a crucial parameter
  • Winnofil® GCC grades provide the right balance of extrusion rate and mechanical properties combined with excellent dispersibility and good slump properties
  • Harborlite® an expanded perlite provides lightweighting , reinforcement and control over the viscosity
  • Suzorite® a ground mica provides higher thermal and electrical barrier properties 

Other recommended products are also suitable for silicone sealants such as Atomite, Gamaco, Camel-wite and Gama-Sperse CS11.

Customized solutions for polyurethane

Imerys ground calcium carbonate (GCC), calcined kaolin and wollastonite are effective solutions for polyurethane based moisture cured adhesives. 

We particularly recommend the following ranges:

  • Kotamite® surface treated GCC with optimized level of coating, including low-moisture content grades to decrease moisture scavenger content
  • Camel-Cal® cost-effective GCC 
  • Polestar® calcined kaolin provide the correct ratio between viscosity and reinforcement 
  • Nyad® 400 acicular shaped wollastonite improve cohesion properties 
  • Winnofil® the best solution to enhance rheological properties  
  • Socal® ultrafine surface treated PCC provides rheological and mechanical properties

Polysulfide adhesives

Imerys engineered coated ground calcium carbonate solutions for polysulfide adhesives include:

  • ImerSeal® 75 coated GCC with optimized level of coating including low particle size grades to boost mechanical properties
  • Kotamite® cost-effective coated  GCC 
  • Socal®  a uncoated pcc which improves strength and durability
  • Winnofil® – for good rheological properties combined with good slump properties

Hybrid polymer adhesives

We supply a wide portfolio of calcium carbonate products for improving the properties of silane-terminated polymer adhesives and sealant formulations


Our Drikalite® cost-effective GCC products are specifically recommended for providing correct viscosity and mechanical properties at high loading in parquet flooring adhesives.

Our premium ImerSeal® 75 a surface-coated GCC grades provide low moisture content and viscosity, good adhesion and elongation at break in roofing adhesives used for EPDM and concrete bonding. 

Our Nyad® G wollastonite provides excellent dimensional stability of cured adhesives.


Low modulus:

  • Gama-Sperse® CS 11 and Kotamite®  coated grades provide ease of use and improved storage stability


Medium modulus: 

  • Socal®  a GCC grade provides low moisture content and excellent storage stability
  • Winnofil®GCC grade boosts tensile strength


Camel-wite®  is a wet ground carbonate provided in either a treated or untreated form. Camel-wite improves the rheology control in the epoxy systems. The product has been processed to remove most of the impurities associated with the ore. 

Winnofil® is a surface treated ultrafine PCC providing excellent dispersion, viscosity and adhesion.  


Our silane-coated and amino silane-coated wollastonites are best-in-class solutions for improving cohesion strength and replacing milled glass fiber in epoxy systems: 

  • Aspect®  a silane-coated wollastonites improve cohesion strength in thermoset seam sealers and structural adhesives and can be used to replace milled sized glass fibers
  • Nyglos ® a amino silane-coated wollastonite improves cohesion strength in high filled thermoset composites, replacing milled sized glass fiber  

We offer a full range of custom 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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Adhesives, Caulks & Sealants