Gear Aid Tent Sure floor sealant with foam brush, 8-Ounce Tent Sure by Gear Aid urethane sealant restores your tent floor. Waterproofs and protects synthetic fabrics. Ideal for tents, flies, rainwear, clothing. Water based urethane formula waterproofs tent floors, tent flies and synthetic fabrics. Flexible and long-lasting. Waterproofs up to 85 sq. ft. Non-toxic formula. High performance formula dries to a clear, flexible, long lasting film. Made in USA Works great on other outdoor items like lawn chairs, patio umbrellas, and more.