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Foundry

We provide the best quality bentonite for the foundry industry.

Our range of solutions are endorsed by our product development and research teams, exclusively dedicated to checking the quality parameters of our high-grade bentonites. 

They ensure our products meet the first-class standards required by the casting and refractory industries.

Our commitment to innovation enables us to design bentonite-based products that adapt to each market’s specific needs in various contexts. Thanks to this technological approach, we obtain high-performance formulas that comply with the green sand requirements of the foundry process.

Tolsa foundry products portfolio includes superior binder additives made from the highest-grade bentonites extracted from our own mines worldwide to meet first-class casting standards.

These products have been specially developed to provide the constant homogeneity and thermal stability required to execute the casting of complex pieces with the utmost precision and performance.

Green Sand

The green foundry sand moulds are the most popular in casting due to their versatility and greater economic efficiency. However, these moulds need to be sufficiently stable to maintain part shape during casting of molten metal and allow easy demoulding after cooling the workpiece. Our additives ensure the proper mould behaviour during the various stages of production of the piece.

Tolsa portfolio for green sand has been specially developed to provide the constant homogeneity and thermal stability required to execute the casting of complex pieces with the utmost precision and performance.

Our bentonites work perfectly on iron, steel, aluminum, and copper foundry systems.

Benefits:

  • Excellent mould strength.
  • Thermal stability.
  • Fast rehydration rate.
  • Lower casting defects.

Foundry Paints & Coatings Additives

Tolsa has a whole portfolio of rheological additives specially developed to optimize the rheology of the entire thickening system of paints and coatings, either alone or in combination with other organic additives.

The result is exceptional sagging control while also maintaining excellent levelling properties and optimal stability during transportation and storage, avoiding the settling of pigments and fillers in foundry paints and coatings.

Our additives work perfectly in waterborne and solvent-borne systems.

Benefits:

  • Better thickening and anti-sagging properties.
  • Excellent anti-settling and anti-sedimentation capacity.
  • Easy gelling thanks to high purity bentonite dispersing capacity.

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