A magnet on a wall is loaded in shear, not in pull. What stops it sliding is mostly friction, which equals the magnetic pull multiplied by the friction coefficient between the two surfaces. Because that coefficient is well below one on smooth painted or plated steel, a magnet rated for a heavy pull load can slide under a much lighter hanging load.
There are three standard fixes: raise the pull force, raise friction with a rubber or textured face, or add a mechanical ledge. Patterned magnets add a fourth. Correlated Magnetics Research says its attach Polymagnets show up to 8 times more shear strength than standard magnets, a vendor figure from its own testing. Its applications page builds on that for retail fixtures that can be reconfigured quickly and for organization systems that hold heavy items on walls.
Published products show the idea. CMR's Hooked on Paint line paired Polymagnets with magnetic paint for hanging frames on walls, and a later post on CMR's blog describes Gator Magnetics garage organization products built with Polymagnets.
Test on your real surface. Paint, powder coat and thin sheet steel all reduce holding force, and shear rating depends heavily on the finish.
WholeMagnetics, 2026-10-04. Polymagnet facts are taken from Correlated Magnetics Research’s public pages, listed below; vendor performance figures are CMR’s own.