Avocado Hair Mask DIY Avocado Hair Mask for moisture, hydration, and breakage prevention. Ingredients 1/2 Avocado (Mashed) 1 Egg (Beaten) 1/2 Large Banana (Mashed) 2 Tablespoons Olive Oil Directions  Combine all ingredients in blender, strain mixture to ensure no banana strings. Apply to clean hair and let sit for 25-30 min. Rinse with cool water.