A sealer for use in sealing a canal wall in a root canal treatment orretreatmentprocedure, comprising an adhesive compound having a viscosity between about 1mPa.cndot.s and about 900 mPa.cndot.s at 23° C. The sealer may comprisea compound diluted tothe desired viscosity within said range, including a natural or syntheticbioadhesive.