DESMOPHEN NH 1521 is a reactive thinner which is suitable for high-solids formulations. DESMOPHEN NH 1521 can be used alone or in combination with suitable OH-functional polyacrylates and cured with polyisocyanates like Desmodur® N 3600 or N 3390. This allows for the formulation of durable, long-lasting primers and topcoats with high-solids content. DESMOPHEN NH 1521 helps increase the solids content of coatings while maintaining excellent application properties like flow and leveling. The increased solids translates to better hiding power, thickness and durability of the dried film. When used in combination with polyacrylates, DESMOPHEN NH 1521 offers flexibility in formulations for varied performance demands. It provides an economical and environment-friendly alternative to traditional solvent-borne systems in industries that require high-performance, long-lasting protective and decorative coatings.