![]() The influence of product and application type is evaluated in terms of the quantity of absorbed product and amount of deposited gel (SiO2). The consolidation effect is related to three types of treatment applications, each time based on capillary absorption on two different types of limestone. This paper describes the results of a laboratory research carried out at KIK-IRPA that aims to better understand the behaviour of eight different ethyl silicate products. Today there is a wide variety of TEOS-based products available on the market with different compositions and it is not at all clear which product(s) are more appropriate than others for a particular case. When granular disintegration occurs, a consolidation treatment with silicone compounds, specifically ethyl silicate (tetraethoxysilane, TEOS) is often chosen in order to improve cohesion between the material particles. The loss of cohesion of stone materials, mainly caused by weathering, is a common problem in the conservation of our cultural heritage.
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