Star brite Waterproofing with PTEF is the easiest yet most effective way to restore water-repellency to boat tops, covers, or other marine fabrics, including Sunbrella. It's also ideal for protecting new fabrics, adding years of service life by repelling stains and damaging UV rays. It's safe for use on tents, outdoor clothing, tarps, and other outdoor gear.• Restores water repellency to boat tops, covers, and other fabrics• Also ideal for protecting new fabrics• PTEF polymers repel stains and UV rays• Safe for all fabrics including Sunbrella and outdoor gear• Will not change color or feel of fabric PTEF polymers repel stains and damaging UV rays Safe for use on tents, outdoor clothing, tarps, and other outdoor gear | Waterproof with PTEF, 1 Gallon