Asín tibuok is a rare Filipino artisanal sea salt from the Boholano people made from filtering seawater through ashes. A variant of the salt is also known as túltul or dúkdok among the Ilonggo people. It is made similarly to asín tibuok but is boiled with gatâ .
Both of them are part of the unique traditional methods of producing sea salt for culinary use among the Visayan people of the central Philippine islands. They differ in taste from salt obtained through traditional drying beds or modern methods. Asín tibuok has a sharp taste with smoky and fruity undertones, while túltul has an innate savory flavor. They are characteristically finely textured with small granules. They are consumed by grating a light dusting over food.
The tradition of making asín tibuok and túltul is nearly extinct due to the difficulty and length of time it takes to manufacture them, the passing of the salt iodization (ASIN) law in 1995, as well as competition with modern imported salts. They are only barely preserved in Bohol, Capiz, and Guimaras. Asín tibuok is listed in the Ark of Taste international catalogue of endangered heritage foods by the Slow Food organization.