V994 is a 1/8″ thick, closed cell Polyvinyl Chloride (PVC) with acrylic on both sides. It is perfect for sealing out water, dust and light, particularly in joints with a high degree of movement. It is excellent for glazing of joints with high movement such as marine glass. V994 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, produces long-life seal. NorsealÂ® V990 series.