The best natural impregnation oil. At least three coats for indoor furniture and four or more for outdoor furniture. Once it dries, it provides a fairly hard and durable surface, without a film, meaning it never peels off. It deeply penetrates the wood up to its surface. First coat is 50-50 with turpentine oil, meaning pine resin or regular. Then you sand the surfaces and apply with less oil, gradually diluting it less and less. I applied it to a table with amazing results, a bench, and some chairs. The table, although made of fir wood, has been fully waterproofed after 6 coats! It has endured several rains and it's still intact. I didn't like it much on the bench, which I think was acacia, it feels a bit sticky. It's also suitable for cutting boards, crafts, and wooden children's toys because it's non-toxic, unlike varnishes and other oils. More resistant than linseed oil. You need to have the patience to apply several coats and the result will impress you. Unknown as a product in Greece, even professionals in the field don't know it. However, it is very common in America, Britain, and China.