Foam Core Backing Board 3/16" Black 1 Side Self Adhesive 24x36- 10 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects - Walmart.com
Self Adhesive Foam Boards - Square Signs
Loctite PL 300 Foamboard 10 oz. Latex Construction Adhesive Blue Cartridge (each) 1421941 - The Home Depot
Amazon.com: Mat Board Center, Pack of 10, 16x20 Self Adhesive Foam Board for Picture and Poster Mounting, Lightweight White Color Foam Board for Crafts, Artworks, School Projects, 3/16 inches Thick : Office Products
Loctite PL 300 10 oz. Foamboard Adhesive (2-Pack) 1421941 - The Home Depot