Most often, substrates of such material as: foamed polyethylene, polystyrene or isoshum are used. More popular, due to its efficiency, is considered polyethylene backing foam. She does not miss moisture, chemically persistent, good antiseptic, absorbs sounds and noise. It is good that this substrate retains heat. Another excellent quality — it easily fits, easily cut, little waste. And given the long enough service, it saves funds perfectly. But at the same time there are disadvantages: since the time the material is compressed almost twice, and this, in turn, has a bad effect on its properties.
