Pristine Products - Liquid shield is a water-based product that can be used as an interior or exterior spray-on dressing. Due to its high silicone content, this product is perfect for hydrating interior or exterior surfaces. This is a non-sticky and non-greasy formula that will not dry or crack interior vehicle components. For exterior use, this can be used on plastics, tires, & wheel wells for a hydrated & like-new appearance.