The enclosed instructions are a bit confusing, but watching their video tutorial helps out a lot. Easy enough to apply.
While it protects the areas it covers relatively well, it scars easily. After pushing bubbles and things out, i let it sit for about five minutes.
These filters really help in lowering the amount of white dust we have. Much less expensive than the ones sold by humidifier manufacturer. For use in humidifier.
The humidifiers leave a fine white dust around the house the the minerals in the water. Their life span is fairly short. Not worth the money.