Promag Adhesive Magnetic Tape Roll-1/2 Inch X 25 015377123252 eBay - dripdropdeals Go to product viewer dialog for this item.
This light-duty tape is an at Walmart for its ease of use in crafts and photo mounting. It is noted for being flexible and mess-free since it requires no extra glue. ProMAG Heavy-Duty Magnetic Tape Office Depot& more Go to product viewer dialog for this item.
A stronger option available at Office Depot and Michaels Stores . While labeled "heavy-duty," some user reviews on Google Shopping suggest its magnetic strength is best for lightweight items like paper or small crafts.