The present invention relates to a non-adhesive coating composition, including: 100 parts by weight of colloidal silica sol; 5˜60 parts by weight of hexagonal boron nitride (hBN) serving as a filler; 60˜120 parts by weight of alkoxysilane; 40˜130 parts by weight of alcohol; and 0.5˜3.0 parts by weight of a catalyst.