A: Thanks for reaching out. Rust-Oleum ShieldH2O Water Repelling Treatment is a solvent based water-repelling treatment that allows fabrics to breathe while keeping rain from the surface. The link below is for the Safety Data Sheet (SDS) for ShieldH2O, this has complete health and safety information. - Rust-Oleum Product Support 6
A: Yes it can be used on cotton.
A: Happy to help Lee. Rust-Oleum Shield H2O Outdoor Fabric Water Repelling Treatment is ideal for use on leather, suede, polyester, cotton/polyester blends and canvas fabrics. It is suitable for use on shoes, patio furniture, backpacks, gloves and camping gear. It is not recommend for use on 100% cotton. - Rust-Oleum Product Support 6
A: As long as the fabric is not plastic or vinyl it should work super!
A: Happy to help! Rust-Oleum Specialty Outdoor Fabric Spray Paint works best on weathered and worn fabric, outdoor polyester, or polyester-blend fabrics! It is not recommended on new or treated fabrics which are designed to repel water and make water-based paint difficult to apply. - Rust-Oleum Product Support 3
A: Thanks for reaching out Doug. Rust-Oleum NeverWet Outdoor Fabric Water Repelling Treatment can be applied on polyester, cotton/polyester blends and canvas fabrics. If your patio umbrella is one of those fabrics, it can be applied. A test spray is recommended to obtain a feel for the spray pattern. Test in an inconspicuous area before application for colorfastness. - Rust-Oleum Product Support 6
A: As long it's some kind of fabric it should work super. Don't use on plastic!
A: I don't see why not, be sure to leave umbrella open while it dries.
A: I have used it on outdoor canvas fabrics and it worked great.
A: Although most patio umbrellas are already water resistant or waterproof it can be used on a patio umbrella. First do a test spot just in case of discoloration.