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Water glass refers to water-soluble sodium, potassium and lithium silicates, which are available in both solid, glass-like form and – predominantly – as aqueous solutions. Depending on the predominant alkali metal, the terms sodium water glass, potassium water glass or lithium water glass are used.
Lithium water glass is characterised by low viscosity and a particularly fine silicate distribution, which allows it to penetrate deeper into porous surfaces and distribute itself more evenly in capillaries and cavities. After reacting with mineral substrates, it forms a dense, evenly cross-linked silicate structure, which leads to improved surface compaction and sealing of concrete. The resulting silicate phases are comparatively water-resistant and crack-resistant.
Due to the higher raw material costs and the more complex manufacturing process, lithium water glass is significantly more expensive than potassium water glass, which can be used for many applications but does not achieve the same penetration depth and durability in all cases.

Synonyms:

•    Lithium water glass
•    Lithium silicate
•    Lithium polysilicate
•    SINASOL® L-P20 (trade name)

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