Unblocks kitchen & bathroom drains Working in 2 hours Removes stubborn blockages Easy to use 1 Litre HG Duo Powerful Drain Cleaner (2 X 500Ml) | Hag343100HG Duo Unblocker – 2 x 500ml has been developed specially for the most stubborn blockages caused by grease and food remnants in kitchen sink or hair, toothpaste, soap remnants or skin grease in bathroom sink. 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.