SiwoPUD®-E620

When your coating needs to do more than just cover a surface—when it needs to protect, perform, and last—SiwoPUD-E620 rises to the challenge. This aqueous, aliphatic polyurethane dispersion based on polycarbonate delivers a rare combination of mechanical strength, optical clarity, and environmental safety, making it the go-to solution for demanding applications across leather, rubber, and film substrates.

Formulated as a 40% solid dispersion in water, SiwoPUD-E620 balances user-friendly application with high-performance results. Its translucent appearance ensures visual appeal on both clear and colored substrates, while its mean particle size ≤100 nm allows for a smooth, even finish. The dispersion has a pH range of 7.0 – 9.5, keeping it compatible with a broad spectrum of formulation systems. Even better? It’s completely NMP-, NEP-, and DMAC-free, aligning with today’s rising demand for safer, greener chemistries.

But the real beauty of SiwoPUD-E620 is in the numbers. With elongation between 800–900%, a tensile strength of 53.5 MPa, and a 100% modulus of 3.8 MPa, this coating forms a film that’s as flexible as it is strong. That means you can stretch it, stress it, and trust it to stay intact. The finish is medium-hard and impressively dry-fast, providing fast turnaround for production lines.

When it comes to resilience, SiwoPUD-E620 doesn’t back down. It offers excellent water resistance, abrasion resistance, light fastness, and hydrolysis resistance—a full suite of protective qualities that ensure your coating lasts, even in challenging environments. Thanks to its non-yellowing formulation, it maintains clarity over time, making it ideal for visible or premium surfaces.

Easily diluted with up to 80% industrial alcohol, this dispersion remains storage-stable when sealed and kept in a frost-free environment. Whether you’re formulating for fashion leather, industrial film, or specialty rubber products, SiwoPUD-E620 delivers strength, style, and sustainability in one high-performance package.