Krylon-Chalkboard Aerosol Spray: Clear. Chalkboards are not just for classrooms. This easy-to-apply paint creates a tough slate-like surface that is durable and functional. Perfect for offices, kitchens and kids' rooms. Works on wood, drywall, metal, glass, plaster and ceramic. Easy application and long-lasting finish. This package contains one 12oz aerosol spray can. DANGER: Extremely Flammable-vapors may cause flash fires. Conforms to ASTM D 4236. Made in USA.