Fire-prevention partitions use multi-layer fireproof glass filled with gel.
This construction represents a so-called sandwich made of several sheets of tempered glass. Spaces between the sheets are filled with special gel, which becomes hard under the influence of high temperature and forms a thick crust preventing the penetration of heat and fire.
In case of fire such double-glass unit is ruined gradually, layer by layer. Depending on time, during which a partition should prevent the spreading of fire and heat, matt glass of various thickness is used: