What's the average cost to undercoat a car?

Average cost to undercoat a car in United States in 2025 to 2026 varies by type of undercoating and location, but typical ranges are as follows. For basic rubberized undercoating applied to underbody and wheel wells at auto shop, average cost is 150 to 500 dollars for sedan, with most cars around 250 to 400 dollars. For premium polyurethane or hard coating that lasts longer, cost is 400 to 800 dollars. For oil based annual rust proofing like Krown, Fluid Film, or NH Oil, cost is 120 to 200 dollars per year and needs reapplication annually. For dealership undercoating package often bundled with rust proofing and paint protection, cost can be 500 to 1200 dollars, though dealership markup is high. DIY undercoating with spray cans costs 50 to 150 dollars for materials. Cost depends on vehicle size, SUV and truck cost more than sedan, and amount of prep needed if rust removal required adds 100 to 300 dollars. So average professional undercoating is about 250 to 500 dollars for standard car for rubberized coating that lasts 2 to 5 years, or 150 dollars annually for oil spray. Prices are higher in rust belt states where demand is high.