This brush cleaning and restoration product is designed for model makers who wish to maintain or restore their brushes to like-new condition. It contains no solvents or alcohols that could damage the bristles of synthetic or natural brushes. It is recommended to soak the brush tip in this liquid for 24 hours for deep cleaning and restoration, and to repeat the process if necessary for severely damaged brushes (*the tip should be suspended without touching the bottom of the container to prevent it from losing its shape). This product will extend the life of your brushes more than any other cleaning agent.