HG gel unblocker is not just a drain unblocker gel! It is a unique, safe and extremely powerful drain and sink unblocker gel that can be used immediately. This special drain gel is firm and thick and therefore, in contrast to an ordinary liquid unblocker, it absolutely cannot splash at all. With results after just 30 minutes and no hot water needed, this unblocker is ready to use on most drain types except aluminium and zinc drains.