Hair is the cause of blockages in sink, shower or bath drains in a bathroom. Soap remnants, skin grease and toothpaste that are retained by hair only make the problem worse. HG hair unblocker has been strengthened with potassium hydroxide and therefore makes quick work of this problem and completely dissolves the hair and all the materials blocked by it.
If there is standing water in the bathroom sink, shower tray or bath, try to remove as much of this as possible. Then carefully pour the entire content of bottle 1 down the blocked drain and then carefully the entire content of bottle 2. Leave it all to work for 1 hour and then rinse with plenty of water