Are you still air sealing houses with sill seal? You should stop and here’s why. This traditional gasketing strip gets knocked out of place easily. Here’s an example of a house that I went into recently where this traditional gasketing strip had gotten knocked out of place. Whatever insulating properties it may have had are now gone. Instead you should use our Tytan Professional Gasket Foam, which provides an airtight seal behind the drywall. It actually rebounds out and creates a gasket to prevent the air from leaking out. It helps improve your blower door test results.