Bond Builder Lipid Shield replenishes lost essential oils that coat each strand of hair, protecting the cuticle from dryness and damage caused by factors such as UV rays and heat. Our fast-absorbing, non-greasy formula is modeled after the hair's natural lipid shield and contains biomimetic ingredients and lightweight oils to restore the hair's first line of defense and protect bonds in the cortex.Directions for use: Shake well before use. Tilt the bottle slightly and tap the bottom to dispense 5-6 drops into the palm of your hand. Apply to the mid-lengths and ends of towel-dried hair. Short, fine or unprocessed hair may require fewer drops. Long, coarse or heavily processed hair may need more. Start with a smaller amount and add more as needed. Use every 2-3 washes to restore the hair's lipid layer. For very dry or damaged hair, use more frequently. If the ends feel particularly dry, 1-2 drops can be applied to the hair after styling. Can also be applied to dry hair and left on overnight, then wash out in the morning.