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Is polyurea suitable for waterproofing a flat roof?

By the SealCraft Iberia team · Updated June 11, 2026

Yes, polyurea is one of the best solutions for waterproofing a flat roof. The coating is applied seamlessly across the entire roof, including around roof penetrations, upstands and corners, exactly the places where leaks usually begin.

Because polyurea bonds fully to the substrate and has no loose seams or overlaps, water cannot get in anywhere. The layer is also elastic and effortlessly absorbs the roof's expansion and contraction caused by temperature changes.

Polyurea is suitable for both renovating existing roofs and new construction, and can often be applied over the existing roof covering after proper preparation.

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