Simmer 1/4 cup dried rosemary in 1-1/2 cups of water. Strain mixture and discard rosemary. Use remaining mixture as the final rinse after shampooing.
Steep 2-1/2 teaspoons dried horsetail (horsetail is a well known herb, it has high silicon content) in boiled water for 20 minutes. Shampoo hair and rinse thoroughly. Pour horsetail rinse through hair, leave in for ten minutes and rinse with clear water.