Patent ID: 6586080
Filing Date: 2003-07-01
Classification: B29C,B29L,B32B,E04B,E04D,Y10T

Abstract:
A sealing sheet assembly bondable to a construction surface comprising:(a) an upper layer of a first substance, said upper layer being selected inherently fluid impermeable; and (b) a lower flexible layer of a second substance, said lower flexible layer being bondable to the construction surface, said upper layer and said lower flexible layer being at least partially attached to one another; wherein a combination of said upper layer, said lower layer and said at least partial attachment of said layers to one another are selected such that tensile forces resulting from constructional movements acting upon the sealing sheet, result in a local detachment or relative displacement of said upper layer and said lower flexible layer, thereby an ability of said lower flexible layer of transmitting said forces onto said upper layer is remarkably reduced, resulting in improved service of the sealing cover as a whole, said at least partial attachment is selected such that a spread of a leakage between said layers via a tear formed in said upper layer is locally restricted.