The most common products for air sealing are:
What are the leaks sealed with?
Unless you have a newly built home, or have had energy improvement services performed on your home, chances are, you have some air leakage. Most people think about windows and doors primarily as the source of air leaks. Realistically, there are dozens of locations in your home that could be letting the heated/cooled air out of your home. Basement walls, crawl spaces, rim joists, around wiring/piping, gaps in the basement ceiling, are just a few places leaks can occur.
The best way to determine where your leaks are, is to have a professional inspect your home. There is specialized equipment for this very task. Infrared cameras and blower doors can provide a lot of information on air flow and leakage.
How do I know if I have air leaks? Where do I look for them?
Air sealing is a commonly overlooked process when the average homeowner considers making improvements to a home to increase comfort and save energy. Air is constantly moving round your home. Knowing where air is "leaking" is key to maintaining the preferred temperature in your home.