Upgrade your roof with the GacoFlex GacoRoof Silicone Roof Coating in White. This 5-gallon container of 100% silicone material creates a seamless membrane to seal and repair existing roofs. With a length and width of 12.5 inches each, it is suitable for most roofs except in the banned state of California. This product comes from the United States and is perfect for your home improvement needs. However, be aware that it contains toluene, which is a chemical that can cause cancer and birth defects. For more information on the California Prop 65 Warning, visit www.P65Warnings.ca.gov.