Icynene, is a popular insulation form which is a foam that starts as two liquid components that are heated up and sent through two hoses only to meet at a tip of a gun . This creates a thin film that expands to 100x its volume in eight seconds.
After the product sets up it has a rough texture that expands beyond the drywall barrier. The installers have to “scarf” — scrape off — the foam in order for the drywall to fit properly.
Tcynene won’t allow air to move through or around it, creating a complete air barrier. Icynene can also be applied to the underside of a roof deck, creating an airtight seal between the roof and the attic space.
Below are pictures of spray foam insulation for remodeling projects.