V988 is a 1/4″ thick, closed cell Polyvinyl Chloride with an acrylic adhesive on both sides. It is excellent for glazing of joints with high movement such as marine glass. V988 is a good choice to seal out water, dust and light, even in joints with a high degree of movement. Due to its excellent resistance to weathering, oxidation and ultraviolet exposure, it produces a long-life seal. NorsealÂ® V980 series.