Abstract: A root canal sealer containing medium chain fatty acid triglyceride instead of eugenol, the sealer further contains calcium hydroxide or calcium oxide and bees wax, the blending ratio of the medium chain fatty acid triglyceride and bees wax is 5:95-30:70 by weight, the sealer being applied to an apical foramen together with gutta percha cone using ultra sonic technology, the sealer enables to employ the calcium ingredient in a desired ratio and the solidifying of the sealer may be accelerated.