Restore water repellency to fabrics.Restores water-repelling action to all marine fabrics. Contains PTEF polymers that help block damaging UV rays and dirt and deposits. Helps to prevent fading and stains. An ideal way to extend the service life of new fabrics, too. Safe for Sunbrella, canvas, polyester and cotton fabrics. Won't affect color or breathability” of fabric.Key featuresWaterproofing with PTEFRestores old fabric and protects new fabricUse on boat covers, Sunbrella, canvas, bimini topsWill not change the color or feel of fabric