The application dimension of the Methyl Diphenyl Diisocyanate (MDI) market is dominated by the construction sector, which accounts for roughly 45 % of total demand. This segment primarily consumes pMDI for rigid foam insulation panels, roofing membranes, and structural sandwich components, driving the largest share of revenue due to the scale of residential and commercial building programs worldwide. Automotive applications, representing about 20 % of the market, leverage MDI‑based flexible foams for seat cushions, interior trim, and sound‑damping layers, reflecting the sector’s shift toward lightweight, high‑performance materials. Furniture manufacturing contributes near 15 % as MDI‑derived flexible foams are integral to upholstery and bedding products. Appliance manufacturers, responsible for roughly 12 % of demand, use MDI for insulation in refrigeration units and washing machines, where thermal efficiency is critical. The remaining 8 % falls under “others,” encompassing electronics casings, marine coatings, and specialty adhesives. Collectively, these application categories shape the overall market size and are central to any Methyl Diphenyl Diisocyanate (MDI) segmentation analysis.