Corrode on surface.Tempered glass is manufactured through a process of extreme heating and rapid cooling, making it harder than normal glass. Treat the surface with SMART process to against abrasion and scratching. Due to its features, it can protect phone screen better from being scratched and broken. Your phone screen will be fine even if the screen protector is broken in normal situations. With a full-scale protection of your phone screen. The Glass is highly transparent, giving you the most real colour effect. The installation is quite easy. You just need to clean the screen first, making sure there is no dust or water. Then peel down the film and adjust the position of the protector then slowly put it down. Press the middle of the protector gently to make it stick to the screen gradually.