Spray-on liquid glass is transparent, non-toxic, breathable, easy to clean, protects against any number of hazards, and can be sprayed on a multitude of things. One spray lasts for a year.
It could be a huge game-changer.
Other outlets, such as many supermarkets, may be unwilling to stock the products because they make enormous profits from cleaning products that need to be replaced regularly, and liquid glass would make virtually all of them obsolete.