If you heat or cool your home with forced air, you could lose up to 30% of it through your ducts if they’re not sealed. That leads to uncomfortable rooms and high energy costs. Sealing them up can make a big difference and it's pretty quick to do. In this video, Kate is using a fiber reinforced water based duct sealant that she got on the internet. Order this online or ask your hardware store about other duct sealing options.