Jackson's : Alkyd Oil Medium

Jackson's Alkyd Oil Medium is a free-flowing, slightly thixotropic medium with an alkyd base. This medium will not increase gloss when added to oil colours. Fast drying and non-yellowing. Use this medium to thin oil paint. Stir before use. It is advised to store Jackson's Oil Medium at a stable temperature. Storage in an overly hot or cold environment will affect the consistency of the product.

Jackson's Alkyd Medium should be quite a fluid medium. If you find it getting too thick, here is a good way to keep it workable:

Maintenance of Alkyd Mediums
Like all alkyd-based mediums, the introduction of air space in the bottle allows for solvent evaporation and drying - even with the lid closed. To compensate, add a little solvent of your choice to the bottle immediately after use and shake it well to maintain the desired thickness of the medium. We tested a variety of types of solvent and they all worked.

Rescuing Thickened Alkyd Medium
If your painting medium has thickened but is still fluid, add in a small amount of solvent and shake thoroughly. Continue adding more solvent and shaking until the medium is close to its original consistency. If a fluid alkyd painting medium has thickened to a gelled consistency, it will no longer help to add solvent - unfortunately, it cannot be rescued.