SiwoPUD®-1591HB

When durability, precision, and professional-grade performance matter, SiwoPUD-1591HB delivers. This aqueous, aliphatic polyurethane dispersion is based on polycarbonate, offering exceptional film integrity and resilience across a range of industrial and specialty applications.

Supplied at 36% in water, SiwoPUD-1591HB is engineered for applications where surfaces like metal, glass, and wood require not just coating—but protection. Its translucent appearance makes it ideal for both clear and pigmented systems, while its non-volatile constituent is tightly maintained at 36±1%, ensuring consistency in every application.

Formulated with DEF organic solvent at just 5%, it strikes the right balance between performance and eco-conscious design. The viscosity remains low (≤200 mPa·s), allowing for smooth, even coatings, while the mean particle size stays under 100 nm, enhancing surface uniformity and gloss potential.

But what sets SiwoPUD-1591HB apart is its remarkable Shore A Hardness of 96—making it one of the hardest flexible coatings in its class. It’s ready to perform in fast-paced production environments too, with a dry/touch time of ≤30 minutes and dry/through time of ≤60 minutes. Even better, its non-yellowing resistance ensures a lasting, pristine appearance over time.

This dispersion cures to a film with excellent adhesion—not just on wood, but also notoriously difficult surfaces like metal and glass. And once it’s cured, the coating shows outstanding water resistance, solvent resistance, chemical resistance, and high weather and stain resistance, making it suitable for everything from architectural glass finishes to rugged industrial coatings.

Storage is straightforward—just keep the product frost-free and in tightly sealed containers, as it contains no preservatives.

For projects that demand high hardness, superior resistance, and long-term reliability across challenging substrates, SiwoPUD-1591HB is more than up to the task. Whether you’re coating glass, metal, or high-performance wood surfaces, this polyurethane dispersion offers a clear edge in quality and endurance.