Mineral wool insulation products of domestic and foreign production are made from mineral wool (GOST 4640-93). As an additive in products of domestic manufacture the organic binder. When the temperature changes with an organic binder is no change, the product does not lose its properties.
All items are imported using phenol-formaldehyde binder. At t 130 º C causes its evaporation, mineral wool is left without a binder fiber wake up and the product loses its properties as a thermal insulation material.