Every kind of detergent has a very toxic chemical composition. However, after the Wet and Forget cleaner has completely dried on the surface, you can walk normally on it. Moreover, when it rains or the humid weather makes the surface wet, it is still very safe for you and your family.
Please note that it will only be really safe when you leave Wet & Forge to dry completely after applying them. The best way is to leave them for 1 day.