What is 2K Urethane? Why choose Beger 2K Supreme for premium wood floors and furniture?

Introducing “Polyurethane 2K”: What is it? Along with clarifying questions about Beger Polyurethane 2K Supreme, a high-quality wood coating that provides gloss, scratch resistance, and is truly suitable for interior woodwork.
1K and 2K wood varnish formula, showcases wood grain, resistant to sun and rain, beautifully strong that impresses craftsmen.

Beger 1K and 2K polyurethane wood coatings provide a beautiful gloss finish that showcases the natural grain. They are resistant to sun and rain, suitable for both indoor and outdoor use, and offer a complete range of glossy films to choose from.
If UniTen 2K (polyurethane) applied on wood does not dry, how can it be fixed?

To solve the problem of UniTen 2K (two-component polyurethane) not drying when applied to wood, what should be done? What are the causes, and how can this issue be prevented?