MARK3 Canal Prep - Root Canal Preparation Cream - 18gm/Jar. Lubricates the canal for the introduction of files, and reduces possible file separation. When used with sodium hypochlorite, the chemical action boosts the dissolution of organic tissue and also helps remove the smear layer. Compares to RC-Prep by Premier. Contains urea-peroxide 10% and ethylene diamine tetra acetic (EDTA) acid 15%.