W. R. MEADOWS PREMOULDED MEMBRANE® VAPOR SEAL with PLASMATIC CORE® (PMPC) is a patented (#US 7,179,761) 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.

W. R. MEADOWS PREMOULDED MEMBRANE® VAPOR SEAL with PLASMATIC CORE® (PMPC) is a patented (#US 7,179,761) 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 is a patented 7-ply membrane designed for horizontal waterproofing and vaporproofing applications and is part of the complete W .R. Meadows building envelope product line.  It exceeds industry standards for puncture resistance, tensile strength, and offers the lowest perm rating in the industry, less than 0.002 perms,” says Russ Snow, Building Science Specialist at W. R. MEADOWS.

“The durability and performance characteristics of PMPC, along with its ease of application, offers the industry a superior vapor barrier where prevention of moisture migration is critical.”

For more information about PMPC, including Data Sheet, application details, specifications, and project profiles visit www.wrmeadows.com or call (847) 214-2100.