A modified bitumen sheet material and method for a protective moisture barrier, particularly for masonry surfaces. The sheet material has a bitumen layer modified by the addition of a minor amount of a long-chain polybutadiene-isocyanate urethane polymer and optionally, a modifying amount...http://www.google.fr/patents/US5763036?utm_source=gb-gplus-shareBrevet US5763036 - Polyurethane-modified bitumen sheet material and method for protective moisture barrier
Polyurethane-modified bitumen sheet material and method for protective ...
