The main component is EDTAsalts. After injection into dentine, EDTA forms a complex with dentine calcium, loosens the structure of hard tooth tissues, and makes easier the enlargement of the calcified and sclerous orifice of the canals, cleaning, and formation of hard accessible tooth canals. The lubricating agent is good for endodontic instruments. Water soluble Paste base allows easy and fast washing of the canals. The use of Smart Prep paste with Carbamide peroxide together with the solution of sodium hypochlorite makes a foam because of the active emission of chloride and oxygen. Dental product is produced for use in aggressive biological medium with a temperature range between 32°C and 42°C (in the oral cavity at the temperature