Tent waterproofing spray should be applied to canvas and nylon camping tents to make them more water repellant. The same sprays can be used on boots and other leather, clothing as well as jackets and pants. The Kiwi Camp Dry line of products is a great option for waterproofing all these different materials for outdoors use. The silicone and other ingredients in the best waterproofing sprays like Nikwax, Aqua Armor, and 3m are the main reasons for the seam sealing and water resistant properties for shoes, clothing and tents as alluded to above.
