W. R. MEADOWS' Premoulded Membrane® Vapor Seal with Plasmatic Core® (PMPC) is a patented seven-ply, weather-coated, permanently bonded, semi-flexible vaporproofing/waterproofing membrane composed of an exclusive plasmatic core suspended mid-point between two layers of a homogeneous, bituminous material and then sealed under heat and pressure between liners of asphalt-impregnated felt and a glass-mat liner. An asphalt weather coat is applied to the glass-mat liner and covered with a polyethylene anti-stick sheet. PMPC provides a positive, easy-to-install, economical, true vaporproofing and waterproofing system for horizontal applications. Properly applied, it stops moisture migration in footings, concrete floors and structural slabs. For more information, visit www.wrmeadows.com.