What is the difference in application between SX-SC461 and SX-1461 (with and without adhesive)? what does that mean? How does the application and sustainability differ?

The application process is the same for both adhesive and static cling materials. Click here for the instructions: https://www.decorativefilm.com/installation-instructions. The difference between the two is that the static cling material is removable and reusable. The adhesive material, once removed, cannot be reused.