Have you ever noticed the black, sticky, gooey material on the back of mirrors? This is called mirror backing and is necessary to ensure the mirror’s durability and longevity. It is designed to protect the reflective coating on the back of the mirror from scratches and damage while preventing moisture from seeping in and causing damage. While it may not be the most aesthetically pleasing, mirror backing plays an important role in keeping your mirror in good condition for years to come. Read more about How to Remove Backing From Mirror …