Pre-applied membranes

A multi-layer pre-applied membrane comprising a carrier layer comprising polyethylene and a rubber or rubber-based layer against which post-poured building material such as concrete or cement mortar can be cast such that the rubber or rubber-based layer chemically engages with the post-poured building material and such that there is an intimate bond between the membrane and the post-poured building material after it sets, in which the rubber or rubber-based layer comprises process aids and a blend of virgin butyl rubber and reclaimed butyl rubber, and in which the rubber or rubber-based layer further comprises mineral additive that comprises a kaolin to augment the initial bond between the membrane and the post-poured building material and to reduce the bonding time.