Today's commercial high rise window and door installation require a uniform clean sub straight to receive membranes as part of a exterior moisture or vapor barrio system. Where a sub straight surfaces such as brick, steel or precast concrete is expecting to receive a peal and stick membrane EnvelopeSealant TM may be used primer ensuring a uniform surface provides an excellent bonding surface. The rough opening surfaces which include: interior wall framing, sill, headers over onto the sub straight surface minimum 15 cm