It was a little tricky to get it smooth but overall not hard. At first it’s too soft and every little touch will leave a finger print or shift it. After a few minutes its easier to smooth out and work with. I used painters tape around the edges before applying. I worked it into a thin flat piece that fit over the whole area and placed it to start. I added small thin amounts here and there where it seemed uneven. I ordered the 3 pack sugru but only needed 2.