Permanent Water-Guard® is a fluoropolymer surface treatment applied in a water system without solvents, silicone, waxes, or any other extenders. Permanent Water-Guard® is the most effective and durable water repellent you can apply. It is compatible with all washable fabrics and performs best when heat activated with an iron or clothes dryer. When applied according to directions on fabric that can be washed and ironed, Permanent Water Guard® will exceed the performance of factory applied water repellents.