A prep spray for hair. Protect and strengthen your hair with the Shrub Prepare & Protect Hair Primer. This lightweight spray can be used on wet or dry hair to help protect your strands from environmental aggressors. Formulated with naturally derived nettle and elderflower to help soften and protect, and lunaria oil extracted from the honesty plant, your hair will be left feeling smooth and shiny. Infused with essential oils of bergamot and sweet orange, your hair will smell as good as it looks.