ISOGUM-P is an elastomeric modified bitumen waterproofing membrane (SBS), industrially manufactured by impregnation of the reinforcement with the waterproofing compound based on distilled bitumen modified with elastomeric polymers of the latest generation, which gives to the compound superior technical characteristics. The composite reinforcement, made of nonwoven spunbond polyester in combination with fiberglass, conveys good mechanical characteristics, excellent dimensional stability and elastic performance.