. . "Other components that may be used include fillers and reinforcing agents such as ground tires, silica, talc, calcium carbonate, mineral matter powder, and fibres (glass, cellulose, acryl, and rock); pigments; softening agents such as paraffinic, naphthenic or aromatic oils; tackiness imparting resins; foaming agents; and stiffeners such as waxes and low molecular weight polyolefins." . . .