Abstract: A polymer-modified bitumen (PMB) compound for a bituminous covering layer of a roof sheet, predominantly including a distillation bitumen, in particular one which may contain a synthetic rubber filler in the form of SBS (styrene-butadiene-styrene) in an amount which modifies the properties of the distillation bitumen, wherein an additive which further modifies the bitumen is present in the form of a polymer, wherein the SBS-modified bitumen further modified by the additive has properties in respect of a softening point and penetration, wherein the polymer is polyethylene present in an amount ranging from 2.5 wt.-% to 7.5 wt.-%, the softening point is in a range between 70° C. and 170° C., and the penetration value is between 99 and 30 1/10 mm.

Abstract: Roofing material which is formed by one or more bituminous layers and is also provided with a liner and/or reinforcement.

Abstract: A polymer-modified bitumen (PMB) compound for a bituminous covering layer of a roof sheet, predominantly including a distillation bitumen, in particular one which may contain a synthetic rubber filler in the form of SBS (styrene-butadiene-styrene) in an amount which modifies the properties of the distillation bitumen, wherein an additive which further modifies the bitumen is present in the form of a polymer, wherein the SBS-modified bitumen further modified by the additive has properties in respect of a softening point and penetration, wherein the polymer is polyethylene present in an amount ranging from 2.5 wt.-% to 7.5 wt.-%, the softening point is in a range between 70° C. and 170° C., and the penetration value is between 99 and 30 1/10 mm.