Abstract
This article presents the results of research on the topical problems of protection of building structures, structures and products of various purposes operated in aggressive, mainly acidic environments. The existing scientific bases of obtaining high-performance acid-proof cements on the basis of liquid glass with the use of local raw materials and secondary resources of various industries are developed. Questions of increasing and improving the properties of acid-resistant liquid glass compositions by changing the input components: a primer, a filler and a hardener by introducing various active and inert additives, modifying the liquid glass, optimizing curing regimes, selection of compositions for specific operating conditions are considered.