Bound mat in rolls, composed of granules and selected SBR rubber combined with polyurethane resins (MDI), thermo-bound in a continuous way to crosslinked polyethylene. The peculiarity of the material is due to the fact that it incorporates the advantages of the SBR rubber such as the elasticity and durability with those of the polyethylene such as the adhesive gripping and waterproofing of the SBR rubber. Therefore the product does not require an additional application of a waterproofing layer before the screed realization given the major presence of polyethylene. The joints of the material can be easily sealed with adhesive tapes of dBred line. Impact sound insulation on floors with floating screed system or as resilient under floating dry floorings.