I'm skeptical, too. On their site [1] they claim it's "Eco-Friendly & Biodegradable" and that "Once a rainwork is dry, it is non-toxic to the environment!" A di

I'm skeptical, too. On their site [1] they claim it's "Eco-Friendly & Biodegradable" and that "Once a rainwork is dry, it is non-toxic to the environment!" A different page [2] says: "The spray is a solvent-based formula. Because of the solvent, it is not safe to drink the liquid or inhale the vapor. ... Once the Invisible Spray is sprayed on the ground, the solvent evaporates, leaving only the biodegradable water-repelling ingredients locked to the surface, making it superhydrophobic, creating the rainwork!" Not a chemist, but I don't think fluoropolymers are generally biodegradable. In fact, isn't non-biodegradability (and non-bioavailability) part of the point? [1] https://rain.works/invisiblespray/ https://rain.works/invisiblespray/ [2] https://rain.works/product/invisiblespray/ https://rain.works/product/invisiblespray/