As of September 2015, Amazon.com and websites for The Home Depot and Lowe's sell spray foam insulation kits. Amazon.com offers kits from Foam It Green. Sizes range from a sample kit that covers 12 square feet to a large kit that handles 1,200 square feet.
Websites for The Home Depot and Lowe's carry Touch 'n Foam kits. Reviews are mixed, with average user ratings between 2.5 and nearly four stars. Commentators say that the foam applies quickly and easily but is expensive. Lowe's also sells Dow Froth-Pak sealant spray gun foam insulation kits. Reviewers report that the directions are clear, and the kit is easy to set up.