Ferrous Paint Additive - Gallon Size (100 sq ft) Transform a larger wall or room section into a sleek, magnet-ready surface. Our Gallon-Size Ferrous Paint Additive mixes with 1 gallon of interior primer to create a powerful magnetic underlayer, ideal for gallery walls, home offices, classrooms, studios, and creative environments. Designed for projects up to 100 sq ft. Coverage Mixes with 1 gallon of interior primer Covers 100 sq ft with 3-4 full coats Use all mixed material for maximum magnetic strength Features Creates a smooth, magnet-responsive base beneath your topcoat Works with latex primers for easy application Iron-rich formula ensures strong, reliable hold Supports all HOP magnet styles (1x1, 1x2, peel & stick) Best choice for large walls, gallery displays, classrooms, and office layouts Important Notes Do not mix with water Do not use with alcohol- or shellac-based primers Once mixed, the primer cannot be stored; use all material in the same project Keep additive bags sealed until use; iron powder can rust when exposed to humidity
