Earlier this year, a 29-year-old Argentine engineering student mixed iron fillers into ordinary plaster to create a magnet-friendly wall finish. Now it could appeal to 45 million U.S. renter households looking to hang objects without drilling holes

A student developed a magnetic cement finish for walls. This material allows hanging objects without drilling into surfaces. The finish contains mineral and ferrous fillers, enabling magnets to grip it. This innovation offers a solution for renters and easy reconfiguration of spaces. Working prototypes exist, but commercial availability and load capacity remain unknown.