The specialists at HG have developed HG duo unblocker specially for the most stubborn blockages caused by grease and food remnants (kitchen drain) or hair, toothpaste, soap remnants or skin grease (sanitary drains). That will save on plumber's bills. After all, HG duo unblocker is based on a unique double component technology with which you can personally tackle the various types of stubborn blockages in a simple and effective manner. Both products are ready for use and need not be diluted, so that there is less chance of splashes. Depending on the blockage in your kitchen or sanitary drain (read the instructions beforehand), carefully pour 1 or 2 doses of bottle A (see markings on bottle) into the blocked drain. Depending on the blockage in your kitchen or sanitary drain, now carefully pour 1 or 2 doses of bottle B (see markings on bottle) into the blocked drain and leave to work for an hour. Rinse well with plenty of water and now carefully pour the rest of bottle A and then the rest of bottle B into the drain for an optimum effect. Leave to work for an hour once again and then rinse with plenty of water.