i have a tarp i'm currently working on and have run out of the polyester tape that's sold thru the small supplyers that are seen on the camping diy forums. at this point all i need is about 2ft of 1/4-3/8th" for some of the small pull outs for doors, so i went to the local rei and they had nothing smaller than 3/4" nylon, then three fabric stores..in the end i picked up a small roll of 3/8th" wide polypropylene twill tape. my question is is polypropylene close to the polyester in uv resistance? hate to sew this on and a year later have to undertake repairs. what do most others use when small tape is required?