*The Post-it® Dry Erase Surface is designed to stick to a variety of painted drywall and steel surfaces, glass, finished wood, and existing whiteboards or chalkboards. If the surface you are applying it to resists adhesion, we will provide a complete refund or an adhesion assist kit and replacement product, whichever you prefer. Our customer service team can help and can be reached at 1-800-3M-HELPS.