Calasept® Calcium Hydroxide Calasept has a very high content of calcium hydroxide (> 41%) giving a high concentration of hydroxyl ions. These generate the high PH value of 12.4 which has a pronounced bactericidal effect, i.e killing of bacteria. High concentration of calcium hydroxide means long-lasting because the paste can release calcium ions for a long time. Calasept is a ready-to-use paste in air tight syringes for direct application through the sterilized needles. The air tight syringes eliminate the risk of incorporating air into calcium hydroxide turning the material into calcium carbonate. Calcium carbonate is not possible to re-wet into calcium hydroxide Temporary root-filling Pulp capping Pulp protection Insulation in deep cavities Stepwise excavation.