One of the priority tasks for building designers is to provide fire safety of modern buildings and structures, one of the indicators of which is to provide the normative limit of fire resistance of building structures. Wood – one of the oldest building materials – is widely used in construction until today. Together with the positive properties as building material, it has both negative. One of these properties is its flammability.
Research conducted in the article investigates phase and structural modifications in the process of protective coating forming while heating. There are examined patterns of processes of interaction between silicium organic compounds based on the rich polymethylphenylsiloxane with oxide excipients as well as opportunities of their utilization for high-temperature and fire-protection of constructions made of reinforced concrete.