303 Fabric Guard, Upholstery Protector, Water and Stain Repellent, 32 fl. oz. – Link 
Amazon has this currently marked down to its lowest ever at only $13.87.
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As a comparison, Home Depot sells this for $32.04 and Walmart has this at $29.10.
- Restores lost water and stain repellency to factory new levels when applied to clean and dry fabrics by adding a powerful protective unscented coating.
- 303 Fabric Guard will greatly increase water and oil based stain resistance, keeping fabrics dry and maintaining color fastness. Use on upholstery, cushions, umbrellas, life jackets, suede, canvas, and other outdoor fabrics.
- This powerful fabric protectant is safe for all fabric including synthetic and natural fibers.
- 303 Fabric Guard is the only product recommended by and for Sunbrella, as well as other fabric manufacturers to restore lost water repellency to fabrics.
- High quality, premium product. Does not alter fabric color, feel, flammability or breathability. Made in the U.S.A.