Seam Tape is made of a 5 oz spun bond polyester with high tensile, tear, and puncture strength. It is available as one side coated or uncoated. The coated seam tape has a very thin layer of film that provides vapor barrier to one side. The vapor barrier or coating prevents adhesive from bleeding through seam tape, but allows fiber web to become fully saturated to get maximum mechanical bonding with backing of synthetic turf. It also prevents contamination or negative influence from chemicals that may be in or on the surface that synthetic turf is being installed on.