Swelltite is a true advancement in waterproofing membrane technology. It is manufactured at a factory controlled assuring the specifier, contractor, and owner of consistent material application. Unlike other membrane systems, its reactive bentonite compound can expand to Seal small punctures in the membrane. This engineered composite consists of a thick geomembrane liner and bentonite compound with a clear release film attached. It contains virtually zero VOC, can be installed to green concrete, and most importantly, has proven effective.