But the heat resistance of this isolation is relatively low, not more than 130 degrees, the cost is too high and the material and work, the strength is low, the insulation is not resistant to mechanical influences, the adhesion is low compared to other materials, the level of sorption moisture is high, which leads to corrosion of metal pipes, Therefore, water protection is required, and this is additional costs. And another significant drawback is that when damaged the shell, moisture that enters the structure cannot be removed.