Adds Durable Water Repellency, increases fabric strength & protects against UV deterioration; one application can double the effective life of fabrics. Can be applied to wet or dry synthetic fabrics. Synthetic fabrics used for tents and backpacks are coated with a water repellent treatment. Exposure to ultraviolet (UV) light both destroys the water repellency and leads to a reduction in fabric tear strength, significantly shortening the lifespan of equipment. The application of Nikwax Tent & Gear SolarProof® can double the effective life of equipment by protecting against UV damage, while also providing Durable Water Repellency (DWR) to keep the rain out.