Starbrite Fabric Waterproofing with PTEF From boat covers to bimini tops, Starbrite Waterproofing with PTEF restores water repellency to virtually all marine fabrics. It is also an easy and effective way to waterproof car covers, tents, tarps, foul weather gear, convertible tops and more. Starbrite Waterproofing is recommended for use on new fabrics to extend their service life by providing an additional barrier to moisture as well as UV rays. Just spray the fabric to be restored, and allow it t