2. New design: A major update to our window seals, with better sealing and less air convection.The window seal kit can be hand washed or machine washed when it gets dirty or at of the AC season. 3. Premium quality: Universal window sealing kits are made of ,material and last for years. The window sealing kit is waterproof, preventing rain from entering the room from outside when you use the air conditioner on . 1. No more hot air inside: cloth window seals keep hot air out of your house, whether it's from outside or from . Our window seals create a "closed environment" that keeps your rooms cooler for longer. 4. Easy to install: No drilling required. Our window sealing kits are available for all your needs! Simply attach the tape to the inside of the window frame and to the window.