HG Duo Unblocker 2 x 500ml This Most Powerful Drain Unblocker HG duo unblocker is for unblocking serious blockages in the drain. With this drain unblocker you no longer need a plumber! Blockages in the kitchen are caused by fat and food remnants. In the bathroom, they are caused by toothpaste, hair, soap remnants and skin grease. HG duo unblocker is the extremely powerful drain opener for kitchens and bathrooms! Do you need an extremely powerful drainpipe cleaner? Put an end to even the worst blockages with this extremely powerful unblocker. HG duo unblocker is based on a unique 2-component technology that can be used to remedy different types of persistent blockages effectively. It is safe to use and safe for all drains. Both components are ready to use and do not have to be diluted, which reduces the chance of splashing.