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Socal and Winnofil

Socal® and Winnofil® Ultrafine precipitated calcium carbonates product range

The Socal® and Winnofil® product range of ultrafine precipitated calcium carbonates (PCCs) present a variety of benefits in adhesives and sealants, ranging from rheology control, anti-sag and slump, improved adhesion, improved storage stability and enhanced mechanical properties. 

Moisture-curing and non-moisture curing

When used in moisture and other curing systems, Socal® and Winnofil® ultrafine PCCs offer:

  • Excellent thixotropy
  • Outstanding extrusion rates
  • Excellent mechanical properties
  • Longer storage / shelf-life stability
  • Improved smoothness and surface profile
  • Enhanced whiteness and opacity

Socal® and Winnofil® are recommended for:

  • High-performance silicone sealants
  • Polyurethane sealants
  • Medium-modulus hybrid polymer sealants
  • Polysulfide systems
  • PVC Plastisol
  • Butyl sealant and tapes

Certain grades can also be suitable for use in:

  • Hot-melt adhesives
  • Bituminous membranes
  • Sealant tapes/strips
  • Cavity fillers for automotive
  • Acrylic sealants
  • Putties
  • Mastics


The Socal® range is available in a range of particle sizes and surface coatings


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