The wax obtained from sunflower oil forms hard and very homogeneous thermally stable oil gels and is therefore excellent for light-coloured, practically odorless and tasteless lip balms, lipsticks and other oil gels. Chemically it has a long chain (about C60) wax ester mainly from monovalent alcohols and acids. Sunflower wax has a melting point of about 80°C and a narrow melting curve with no molten contents below 55°C. Consequently the oil gels are very heat resistant.

Source: Cosmetic Formulation Principles and Practice - Heather A.E. Benson, Michael S. Roberts, Vânia Rodrigues Leite-Silva, Kenneth A. Walters