Ethyl Silicate

Alcohol Investment Casting Binders

 

Alcohol based, ethyl silicate binders were formerly the most common binder for the production of ceramic shells in the investment casting industry. Through an ammoniating process, ethyl silicate binders can gel rapidly through increasing the pH, decreasing shell drying times.

If your foundry is considering replacing alcohol based ethyl-silicate binders with water based, colloidal silica to reduce the emission of volatile organic compounds (VOCs) or improve the quality of your castings, have a look at our REMASOL® colloidal silica binders. Remet's staff are experts in managing this conversion, delivering cost savings, process improvements and higher quality castings.

See our FAQ's about shell testing here.

TES40 WN

Product Information

TES 40 WN

 

Wacker Silicate TES 40 WN is an ethyl suilicate providing approximately 41% of silicon dioxide (silica) upon complete hydrolysis.

Wacker Silicate TES 40 WN is used for the precipitation of silica. The SiO2 coating firmly binds inorganic fillers and pigments and adheres well to different inorganic substrates like glass, ceramics or metal. Chemical and mechanical properties of the substrates can be improved by the thin SiO2 film, which is also highly heat-resistant.

  • Binder for zinc-rich anti-corrosion paints
  • Binder for refractory fillers (production of ceramic shells and cores)
  • Precision casting
  • Coating material for pigments and fibres
  • Liquid source of SiO2 as a (film-forming) binder
  • Crosslinking agent, e.g. for silicone elastomers
  • Sol-gel processes

Special features

  • Storage-stable, low-viscous binder with a high silica content (41% SiO2, fully hydrolysed)
  • Liquid source of silica with a high flash point

 

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Silester A1

Product Information

Wacker Silester A1

 

Wacker Silester A1 is a proprietary prehydrolysed hybrid ethyl silicate binder. The specially formulated ready-to-use product is optimised to give maximum mold strength and slurry stability over a wide range of foundry operating conditions for both shell and solid investment casting molds.

 

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Silester XAR

Product Information

Wacker Silester XAR

 

Wacker Silester XAR is ready-to-use, prehydrolysed ethyl silicate hybrid binder. The solvent in Wacker Silester XAR is a mixture of ethanol and 2-propanol.

 Its degree of hydrolysis and pH has been optimised so as to provide the necessary reactivity and adequate storage stability.

 A change in pH, e.g. arising from addition fillers, pigments, various additives or solvents evaporation, promotes condensation of the ethyl silicate and the system will cure more quickly.

 Due to their special formulation and the technology used in their manufacture, hybrid binders have very good storage stability and processing properties.

 Wacker Silester XAR is primarily used to make:

  • Ceramic casting molds, e.g. by the lost wax (investment casting) method
  • Refractory products
  • 2-pack anticorrosion zinc-rich paints, especially shop primers

 

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