Fast teeth whitening, from the comfort of your home or office. The main objective of these gel syringes is to be used in combination with the whitening LED from our SHINE® range, but even without this device, the gel will do its job as per the book by applying it directly on the teeth and letting it dry by simply holding the smile for 60 seconds, after which the teeth should be brushed well after a few hours, preferably at the end of the day. Instructions: Clean and dry the teeth before use; Apply a thin layer of gel on the teeth; Smile for 60 seconds to let the gel dry; Brush your teeth after a few hours. What are the basics of teeth whitening? The active ingredients in SHINE® whitening gels are baking soda along with salt. Which gives a whitening as healthy and natural as possible. Baking soda is an alkaline powder and has many benefits, including cleaning and whitening teeth.