PRECON LOW TEMP is a composite sheet membrane comprised of a non-woven fabric, elastomeric membrane, and W. R. MEADOWS’ exclusive, patented plasmatic core (U.S. Patent No. 7,179,761). The plasmatic core is a seven-layer matrix designed for toughness and provides the lowest water vapor transmission (WVT) rating on the market. Once concrete is poured against PRECON LOW TEMP and the concrete cures, a mechanical bond forms that secures the concrete to the membrane. USES PRECON LOW TEMP is used as a blindside membrane in vertical applications where access to the positive side is limited. The membrane can also be used for horizontal applications for underslab waterproofing and vaporproofing. This low temperature version can be installed in temperatures down to 25° F (-4° C).