WACKER® SILICATE TES 28 is monomeric ethyl silicate, also known as tetraethoxysilane or tetraethyl orthosilicate. It is a colorless low-viscous liquid with an SiO2-content of app. 28 wt.%.


  • binder for refractory fillers (production of ceramic shells and cores)
  • precision casting
  • silica coating on pigments, fibers and other surfaces
  • source of finely divided silica
  • crosslinking agent, e. g. for silicone elastomers
  • water scavenger in sealants
  • sol gel processes


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