Fireproofing plays an important role in every building because in case of fire it prevents the spread of fire and smoke beyond the boundaries of fire sectors. Due to the increasing technological equipment of modern buildings, the density of all types of installations is increasing, so the challenges for the correct execution of fire seals are becoming more demanding. Works in this area of fire protection may only be performed by professionally trained persons. We have a Hilti certificate for passing the fire sealing training.