Linseed oil is a yellowish drying oil derived from the dried ripe seeds of the flax plant (Linum usitatissimum, Linaceae). It is obtained by pressing, followed by an optional stage of solvent extraction .

Its uses include:

• Animal feeds
• Putty
• Sealants
• Caulking compounds
• Brake linings
• Linoleum
• Textiles
• Foundry products
• Leather treatment
• Polishes, varnishes and oil paints
• Animal care products
• Wood preservation
• Synthetic resins

The linoleic acid in linseed oil is used as a dietary supplement.

Safety Note: Rags soaked in linseed oil can self-ignite if stored in a confined space. They should be washed with water and disposed of carefully.