Standard Firm 2.75oz. Stitchbonded Polyester Fabric with a firm finish. WCP-SF has good strength and elongation. WCP-SF has good conformability on smooth or semi-smooth surfaces. WCP-SF works well when used over smooth or cap sheet surfaces. It has fewer stitches per inch which allows for better wetability which requires less brooming. Because it has a firm (starched) finish it will have fewer wrinkles and will lay straighter during application. This is the practical choice for use over most smooth or cap-sheet roofs. Also known as W-26 or TieTex T-326 Firm.
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