Tent Fabrics & Outdoor Gear Waterproofing Spray Tent Fabrics & Outdoor Gear Waterproofing Spray Superior BREATHABLE fabric waterproofing concentrate specifically formulated for tent walls, ground sheets and zippers for your continuous camping pleasure. Will also waterproof outdoor gear perfectly, with continuous even waterproofing that lasts. Water based repellent spray Preserves the breathability of modern membrane textiles. COVERAGE AREA 473.1ml. (16fl oz.) covers 50-60 square feet per bottle.