The ideal gift! Buy the best rum online. Price and reviews available for Goslings Black Seal 151 Proof Rum – 750ml Bottle. In typical Gosling fashion, we didnt just dash out a new product. It took several attempts and repeated blending and tastings (tough work, but someone had to do it). We proudly arrived at a muscular, but refined rum that not only won praise from homeward bound visitors, but also from competition judges. Goslings 151 proof Black Seal Rum enjoys great popularity through its inimitable flavour, characteristic taste and unique quality. This lip-tingling spirit makes an ideal complement to any exotic, sun-drenched libation and is excellent in desserts that call for flaming.