Matin LCD Screen Protector.
These protective films for LCD are designed and packaged to fit individual cameras, no cutting is necessary.
In addition they are ultra clear for a high penetration rate, protect against UV light, and unlike others contains no adhesives.
As a result, when removed there is no need to clean the LCD, and when applied there are no air bubbles, and thus no need to squeeze the film onto the the LCD.
Reviewed by 1 customers
I'm not sure if it's "Reliable" yet as I just got it yesterday. But I slapped it on my T2i and stayed on fine, and it does the job I need it to do.