The biggest difference is elasticity. Epoxy forms a hard, rigid layer that looks good and is strong, but barely flexes. When the substrate moves due to temperature or settling, epoxy can crack or delaminate. Polyurea, by contrast, stays flexible and bridges cracks in the substrate.
Polyurea also cures extremely fast, often within seconds, whereas epoxy needs hours or days. As a result, a polyurea surface is usually ready to use again much sooner.
For swimming pools, roofs and terraces on the Costa Blanca, where large temperature swings and structural movement are normal, polyurea is therefore the more durable choice in most cases.
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