Friendly to handle

In traditional 2K solvent-based polyurethane formulations, solvents are added to both parts to reach the desired viscosity for application, and to obtain a simple mixing ratio between part A and B. This can vary from 2:1 to as high as 8:1 or more on a volume basis.

Adding organic co-solvents to waterborne polyisocyanates is usually not necessary. However, the use of co-solvent can help incorporating the hardener into very low viscous formulations, like clearcoats, and improve optical properties of the film.