Abstract: A thermoplastic mass passed between rollers consisting of a mixture, the essential components of which are: from 4 to 60% in weight of an oil having a saturate content, as determined by ASTM D 2007, below 15% in weight and with a high aromatic content; from 1 to 50% in weight of chlorinated polyethylene, having a chlorine content lying between 20 and 95% in weight; and from 20 to 90% in weight of fillers.

Abstract: A process for manufacturing impermeable strips formed by a plurality of layers in a continuous process wherein at least two single or compound flexible plastic layers e.g. polyethylene or thin webs are made to pass under pressure through the nip between two rollers rotating in opposite directions, the bonding material between the layers being asphalt, or an asphalt mixture, in fluid state distributed uniformly between the plastic surfaces to be joined, the heat of the fluid asphalt being prevented from deteriorating the plastic webs by their being cooled with the application of a water film to the respective surface of each plastic web opposite to the asphalt contacting surfaces.