Four agents: (1) tetraethyl orthosilicate Si(OEt)(4), a hydrophilic strengthener dissolved in aliphatics or used alone, hydrolytic condensation time t = 14 days; (II) Si(OEt)(4) + alkylalkoxysilane, a hydrophobizing strengthener dissolved in ketone, t = 14 days; (III) low-M methylsilicone resin carrying reactive silanol groups, a hydrophobizer dissolved in aliphatics or a hydrophobizing strengthener (+ crosslinker), t = 48 h; and (IV) polymethylhydrosiloxanol + PTFE emulsified in water, an antigraffiti agent, t = 48 h, were used to coat a Pinczow (Poland) limestone, and a narrow (23%)and a broad-pore (30%) burnt brick. Dynamic contact angles were measured and surface free energies were evaluated for I-IV Alkyl groups in coatings II-IV imparted hydrophobicity and low roughness. Dispersive interactions (prevailing over polar) in coating IV imparted a higher resistance to fouling. Coating III was smoother than II which contained SiO2.aq agglomerates. AFM photomicrographs showed cylindrical grains, small and spherically regular grains, and amorphous surface in the coatings prepared from polymethylhydrosiloxanol, agent IV, and PTFE, resp. Coating IV did not affect the permeability of the material to water vapor. Numerous sacral, civil and industrial objects were successfully protected in Poland and Ukraine.