FIELD: chemistry.
SUBSTANCE: invention relates to repair damages and protection against corrosion in point of glasslined coatings damage in process equipment of chemical enterprises, systems of pipelines, other equipment of technical purpose and may be used at chemical and metallurgical industry, including using enameled pipes for circulation of fluid with acidic medium. Acid-proof composition containing sodium silicofluoride, contains liquid sodium glass with density of 1.38 g/cm3, as acid-resistant filler is Reftinskaya TPP ash and additionally are iron (III) oxide and magnesium oxide, with following ratio of components, wt%: liquid sodium glass is 37, sodium silicofluoride is 3, Reftinskaya TPP ash is 42-43, magnesium oxide is 1-3, iron (III) oxide is 15-16.
EFFECT: high thermal stability and moisture resistance, low porosity.