Shellac is a natural, organic resin produced by insects that live on trees in India and on Thailand. The resin they secrete goes through various stages of purification to obtain shellac as the final raw material and depending on the type of insects, trees and the process of purification and processing, it is possible to obtain different types of shellac, with different composition, properties and color. It is used in various fields such as pharmacy, food industry, protection and coating of wooden surfaces, cosmetics. Addition of silane would improve the properties of shellac. The aim of this work was to investigate the coating properties of mixtures of shellac (SCH) and two silanes (3-glycidoxypropyl-trimethoxysilane, GPTMS and 1,1,1,3,3,3-hexamethyldisilazane, HMDS) of different proportions, prepared from an ethanol solution, with addition of glycerol. Thermal properties were tested using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) and surface characteristics were tested by measuring the contact angle. The structural properties were analyzed using FTIR-ATR spectroscopy and the barrier properties were determined by measuring water vapor permeability and the coating's resistance to human sweat was tested. According to DSC analysis, it was determined that the addition of silane increases the flexibility of the coating and affects the thermal stability of the coating according to TGA. FTIR analysis showed that there are no significant differences between coatings with and without silanes. In the case of a coating with original (solid) shellac, the water vapor permeability increased with the addition of silane, that is, the contact angle with water decreased. Also, it was determined that with the addition of silane, the solubility of the coating in the sweat solution increases and that the silanes did not improve the required properties of the coating.