Sealing Protrusions … Cut a slit around pipes, ductwork, rebar and wire penetrations to place the initial layer of the vapor retarder. To further protect the concrete slab from external moisture sources, use a piece of vapor retarder and place a collar around these as well.
1. Cut a piece of PERMINATOR a minimum of 12″ (304.8 mm). The length should be 1 ½ times the pipe circumference. With a roofer’s knife or scissors, cut “fingers” half the width of the film. (See figure 1.)
2. Wrap around and tape the collar onto the pipe and completely tape fingers to the bottom layer of PERMINATOR, as shown in figure 2.
In the event that PERMINATOR is damaged during or after installation, repairs must be made. Cut a piece of the vapor retarder large enough to cover any damage by a minimum overlap of 6″ (152.4 mm) in all directions. Clean all adhesion areas of dust, dirt and moisture. Tape down all edges using PERMINATOR TAPE.