Darkening Window Film Tool Kit: Niviy Total Blackout window tint for home package also includes the installation tool kit you will need. The tools include wipes, knives, and squeegees (wipes in random colours). Saves money and time and makes installation easier 100% Light Blocking: Our 100% blackout window privacy film blocks out all sunlight. Create a comfortable sleeping environment when you are resting during the day. Significantly reduces the effects of sunlight and UV rays for you and makes your room feel like night. Better choice to replace heavy curtains and blinds Reusable & Recycled: Sun blocker film for windows is non-adhesive. This film is very easy to remove and leaves no residue, and can be reused just wet it again. The window blackout cover can even be reused many times! Window coverings film is suitable for rental houses Heat Control: By reducing the amount of heat that enters your home, you can lower your cooling costs. Black window film sun blocking can also cut huge energy bill up to 60% by rejecting up to 80-90% of total solar energy Installation Tips: Keep Window or Glass clean and smooth. Spray plenty soapy water to wet glass. Peel off the backing film (Important!). Put the smooth side of film on the glass. Squeegee away water and air bubbles window film