|  1. To open a door and to unscrew screws of fastening of a sealant in the bottom part of an aperture. | 
 
 
 |  2. To remove an old sealant of a doorway. | 
 
 
 |  3. To establish a new sealant of a doorway, since the right top corner of an aperture.  | 
 
 
 | 4. Insert a sealant into other corners and bends of an aperture and in last turn direct sites. | 
 
 
 | 5. To screw up screws of fastening of a sealant in the bottom part of an aperture. |