Mineral oil used for these purposes should meet the following technical conditions:
The fat cement solution of the composition is 1.0: 1.5 or 1.0: 2.0, applied to the isolated surfaces, then wiped with a steel or zinc grater to such an extent that the surface of the plaster acquires a dark uterine form, with abundant watering with water during hardening During careful work, it gives a waterproof layer that can withstand water pressure to M with a layer thickness in PTPU 2-3 cm.
