Oil : versatility 

European settlers quickly learned the value of seals from the Aboriginal community whose use of seal fat  was an important part of their survival skills.

Fuel /Lubrifiat

The fat, which is on the surface of the meat, is easily accessible and when rendered into oil provided clean burning lamp fuel. Today its main values is as a high-grade source of Omega 3. Then and now it  was/is also used as a quality lubricant.

Food

As previously noted a number of cultures including that of the Magdalen Islands, Newfoundland and Labrador and Inuit communities throughout the north have a long tradition of meals based upon seal meat and seal fat products, as do the cultures of the northern counties of Europe. Today these communities still consume seal foods and now export seal foods to chefs outside their traditional markets.

Nutriceutical

The good health of older Indigenous Peoples (before adopting the diets of whites in the south) has led to several studies 1 of their their diet. The studies showed that the seal fat and meat they consumed contained a phenomenal content of Omega-3, the "good" cholesterol. This source of Omega-3 far exceeds all others sources in concentration.

Fatty fish contains eicosapentaenoic acid only (or timnodonique EPA) and docosahexaenoic (DHA or cervonic), but seal also provides very important docosapentaenoic acid (DPA),  thus making it the most comprehensive source of these acids.Studies show that Omega-3 deficiency can cause diseases such as cancer, heart disease, diabetes, obesity, multiple sclerosis,  Alzeihmer,  and others thus making Seal Oil capsules a desirable preventative medication.

if you want to know more about Omega 3 acids please read the study: Omega-3 Fatty acids:Essential to human health (a study ordered by Agriculture & Agri-food Canada)