Higher strength version of Gosling's standard Black Seal rum. 151 refers to the proof. Best served diluted with your favourite mixer or carefully sipped to enjoy its intense dark rum (caramel, spice and herb) aromas and bold spice, dried fruit and molasses flavours. Smooth and rounded on the finish with very little heat. Higher strength version of Gosling's standard Black Seal rum. 151 refers to the proof. Best served diluted with your favourite mixer or carefully sipped to enjoy its intense dark rum (caramel, spice and herb) aromas and bold spice, dried fruit and molasses flavours. Smooth and rounded on the finish with very little heat. 2400 LONG LAKE ROAD, SUDBURY, P3E5H5, (705) 522-8000