Exclusively Formulated for Fabric and Vinyl Safely Removes the Toughest Roof Soil and Stains Will Not Harm Metal, Plastic, Rubber or Wood Finishes Anti-Oxidant, Low pH, NO Bleach Formula, Leaves No Residue Non-Toxic- Environmentally Friendly and Biodegradable Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.