Mobile phone screens are particularly fragile. The only way to protect mobile phone screens is to cover them with an ugly protective film.

But what if you could cover the screen surface with a mysterious viscous material to make it more scratch resistant and waterproof?

This mysterious substance is ProtectPax, an invisible "liquid glass" screen protective film, which is said to strengthen any glass.

ProtectPax is currently crowdfunding in Indiegogo. The adhesive material of ProtectPax is composed of "titanium dioxide particles that fill the tiny pores on the glass", which can make your mobile phone display "as hard as a gem."

The company of the same name that produced this product said that liquid glass nanotechnology was initially developed for the aerospace industry.

And it is also very simple to stick this protective film on your mobile phone screen: cover a large amount of viscous substances on the glass screen surface, wait 10 minutes for it to dry - then your screen will become invincible!

Of course, there are also shortcomings. The validity of the liquid glass protective film is only one year, and it will wear out after one year. At this point, I have a question. Since the protective film is invisible, how do you know whether the protective film covers the entire screen? Also, if this viscous substance penetrates into the earphone hole of the non waterproof mobile phone, will it cause damage to the phone?

If you're brave enough, try ProtectPax for $39