Walls that swallow magnets: argentine student erases drills from rentals
Marco Agustín Secchi has turned the most boring surface in architecture into a silent vise. One coat of his grey slurry and plaster becomes a ferromagnetic skin—no screws, no dust, no landlord tantrums.
The 29-year-old industrial-engineering undergraduate at Universidad Tecnológica Nacional in Buenos Aires calls the mix Ironplac: a mineral-and-iron powder that trowels on like ordinary skim coat, dries in four hours, and holds 2 kg of magnet per square centimetre. Want to swap the Van Gogh for a spice rack? Peel, stick, done. The wall never forgets, but it never scars either.
From lab coat to landlord bait
Secchi cooked the first 10-litre batch in a repurposed paint bucket last March after scanning his rental contract’s drill ban and realising the deposit depended on zero perforations. He swapped Portland cement’s limestone for a ferrite-rich slag, kept the calcium-silicate binder, and ran 38 iterations until the compressive strength stayed above 25 MPa—building-code safe. A 1 mm layer captures fridge-magnet poetry; 3 mm locks a cordless drill in place.
He has already coated two coworking hubs in Palermo without asking owners to vacate—builders applied it overnight like icing. Pollution sensors logged 40 % less airborne silica compared with standard sanding, a side benefit he hadn’t hunted for.
The cost of a wall that clings
Ironplac retails at USD 7 per square metre once it hits Argentine hardware stores next summer, twice the price of common plaster but half the cost of renting a Hilti and patching afterwards. Secchi is pitching it to WeWork-style operators across Latin America; they see 300 % faster churn of wall art for Instagram-ready layouts.
Magnetic paint already exists, yes—ferrous acrylic sold in tins. It sags under weight and needs three coats. Ironplac is structural; you can tile over it or laser-project AR overlays without anchor bolts. Architects at Buenos Aires’ upcoming Casa FOA show plan to hang rotating LED panels from a 6 m Ironplac partition, a stunt no curator would dare attempt with stick-on hooks.
Secchi files patents this week. His real opponent is habit: contractors who own drill bits like dentists own drills. Yet every renter who has lost a deposit cheers for a wall that forgives. Drywall may not vanish overnight, but its monopoly on holes just met a magnetic rival that refuses to leave scars.