SiwoPUD®-1517T

If your coating needs to stay put—no matter the substrate—SiwoPUD-1517T is built for the job. This aqueous, aliphatic polyurethane dispersion based on polyester delivers a rare combination of soft film formation and long-term tackiness, making it a game-changer for primer coatings on challenging surfaces like leather and synthetic blends.

Unlike conventional dispersions that dry down to a clean break, SiwoPUD-1517T holds on with intention. Its film doesn’t just dry—it grips. The result? Exceptional adhesion where other primers fail. Whether you’re coating difficult leathers or stubborn composite materials, this PUD is designed to perform where precision and permanence are critical.

Formulated at 20% in water, it offers consistent application and film build while remaining viscous at ≤100mPa·s—a balance that ensures easy handling across diverse production environments. The translucent appearance keeps the coating visually neutral, while its non-yellowing nature means your work looks as good months down the line as it did on day one.

SiwoPUD-1517T also features a mean particle size ≤100 nm, delivering smooth, uniform film properties. With a pH between 7.0–9.5, it remains stable across a wide range of system compatibilities. Its glass transition temperature of -45°C speaks to its flexibility and softness, making it ideal for substrates that bend, move, or stretch. And best of all—it’s NMP, NEP, and DMAC free, meeting modern regulatory and environmental demands without sacrificing performance.

Thanks to its good shear stability, SiwoPUD-1517T remains consistent during processing, even under demanding mixing or application conditions. Just be sure to store it frost-free in tightly sealed containers, as it contains no preservatives.

For adhesive primers that need to do more than just “stick,” SiwoPUD-1517T is your go-to solution. When grip, softness, and clarity matter, this dispersion delivers.