wheatpaste
Wheatpaste or flour paste is an adhesive made of wheat flour or starch and water. Closely resembling wallpaper paste, wheatpaste is difficult to remove. It is commonly used to make papier mache and activists and artists often rely on wheatpaste for flyposting artwork or posters. http://thesecretyumiverse.wonderhowto.com/how-to/street-art-101-make-wheatpaste-poster-0137642/
