Stansport water Guard, Silicone based spray is as powerful as it is versatile. Durable water repellant is the basis for most waterproof outdoor apparel and equipment, but factory water repellant can wear off. With our water Guard, you can replace the factory water repellent and improve the performance of waterproof breathable jackets, tents, packs and more! Size: 10.5 ounce.