Mfm Building Products 45W12 Window Wrap, 12"For sealing windows, doors, and building joints. With proper application, prevents water leaks, air infiltration, and reduces noise. Self adhered membrane consisting of a SBS rubberized asphalt. Aluminized laminate top surface prevents stretching during installation and allows window wrap to be left uncovered for up to 180 days. Adheres to prepared substrates of plywood, OSB, masonry, aluminum, vinyl, steel, drywall, and housewrap. Impermeable to