The SEN for thin slab con-casting is easy to break and damage because of the oxidation during preheating and application. The enamel coating material is generally applied on the surface of SEN to avoid the oxidation. The coating material with born glass and silicon as main starting materials and silica sol as binder was studied. ZrO2－C and Al2O3－C materials containing 15% carbon were isostatic pressed, and heated at 600 ℃, 900 ℃, 1 200 ℃, 1 500 ℃ for 2 h, respectively. The results show that the coating material with 70% of boron glass and 30% of silicon bonded by silica sol can form denser protection layer in the above mentioned materials at the range of 600－1 500 ℃. The oxidation area ratio and weight loss ratio with the coating are much lower than those without the coating.