A pressure stabilization device for an IGU includes a stem and a boot coupled to the stem. The stem includes an elongated shaft extending from a first end to a second end, and an element extending radially outward from the second end of the shaft, the element having a stronger magnetic attraction than the shaft. The boot includes a spout having a central bore receiving the shaft, a surface of the bore defining an interior groove, and a cap formed integrally with the spout and defining an exterior groove intersecting the interior groove of the spout.