Use a notched squeegee for applying epoxies and urethanes and gain several advantages.

Consistent Thickness 
The notches on the squeegee create even ridges or grooves that help distribute the epoxy and urethane evenly and maintain a consistent thickness across the surface. This is especially important for large or uneven surfaces where achieving uniform coverage can be challenging.

Bubble Removal
Epoxy and urethane applications can sometimes trap air bubbles between the substrate and the epoxy layer. The notches on the squeegee help to release and remove trapped air bubbles as the epoxy is spread, resulting in a smoother and more professional-looking finish.

Control and Spread
The notches act as guides, allowing for better control over the application process. By selecting a squeegee with specific notch sizes, you can adjust the amount of epoxy or urethane being applied, ensuring an appropriate and even spread across the surface.

Time Efficiency
The notched squeegee enables faster application compared to other methods like using a brush or roller. The ridges on the squeegee help spread the epoxy or urethane more efficiently, covering a larger area in a shorter amount of time.

Professional Finish
The use of a notched squeegee can contribute to achieving a professional-looking finish. The consistent thickness and controlled spread help minimize variations and ensure a more uniform appearance, which is desirable in many epoxy and urethane applications.