By Sal Barry

Longtime collectors remember when sports cards started using a high-gloss protective coating in the early 1990s. This coating – known as UV coating – gave the cards like Fleer Ultra and Topps Stadium Club a slick, premium feel to them. Collectors loved it!. But this eventually led to a problem called “bricking.”

Bricking is when cards get stuck together in a stack resembling a brick. And once they brick, they are hard to unstick. Read on to learn why cards stick together, what to do if they brick, and how to prevent that from happening in the first place.