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The technical bulletin for WCP-SS, Western Colloid’s T-325 polyester fabric, describes a stitchbonded polyester fabric with a standard soft finish. The one-page PDF carries the code 1105a at the top. The bulletin says the fabric reinforces cold process roofing systems and conforms well to semi-smooth or rough surfaces.
The bulletin states that the fabric works well over vacuumed, spudded or filled gravel surfaces, and that it has fewer stitches per inch, which allows better wetability and requires less brooming. It lists the roll size as 10 square rolls, 40 inches by 324 feet.
The properties table gives a weight of 2.75 to 3.0 ounces per square yard, or 100 grams per square meter, a thickness of 1.9 mils, a tensile average of 40.0 lb, an elongation of 61%, a burst strength of 102.2 lb and a trapezoid tear strength average of 19 lb.
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