Now you can get all of the great features and benefits of Aquaseal in a larger size. Enough sealant for approximately 12 tires. Aquaseal urethane sealant will protect the sidewalls of your Dugast and Challenge Cyclocross Tubulars from water damage and mild abrasion. Increases the life of the tire and maintains that like-new look. This highly flexible, urethane sealant allows the tire to “flex” naturally while providing protection to the sidewall. 8oz. tube.