Unblock your bathroom drain fast with Rhino Duty Bathroom Drain Unblocker. This powerful solution blasts through hair, soap scum, and sludge, leaving your plughole flowing freely and fresh. Rhino Duty Bathroom Drain Unblocker will blast through hair, soap scum and sludge to leave your bathroom plughole free-flowing and fresh. Kilrock RHINOBATH Rhino Bathroom Heavy-Duty Drain Unblocker 1Litre Rhino Bathroom Heavy-Duty Drain Unblocker has a highly effective, non-acidic formula.