SILESTER® XAR is a ready-to-use, prehydrolyzed ethyl silicate hybrid binder. The solvent in SILESTER® XAR is a mixture of ethanol and 2-propanol.
SILESTER® XAR is ready for use and may be processed straight away to ceramic slips, ramming mixes and anticorrosion paints.
Its degree of hydrolysis and pH have been optimized so as to provide the necessary reactivity and adequate storage stability.
A change in pH, e. g. arising from addition of fillers, pigments, various additives or solvent evaporation, promotes condensation of the ethyl silicate and the system will cure more quickly.
It is also important that the added components do not introduce uncontrolled amounts of water into the system as this would adversely affect the processing time / shelf life of the formulation.
SILESTER® XAR is primarily used to make:
- Ceramic casting molds, e. g. by the lost wax method.
- refractory products
- 2-pack anticorrosion zinc-rich paints, especially shop primers.