Bright White Smiles Teeth Whitening Refill Gel Kit (4) 10cc Syringes (Tooth Whitener Only) 44% Carbamide Peroxide Includes 4 whitening gel XL 10ml syringes in maximum strength 44% Carbamide Peroxide. High viscosity gel formula provides maximum adhesion. This is crucial so that whitening gel remains suspended on tooth surfaces. Many thin and watery whitening gels “run off” teeth during the whitening process, which compromises a uniform and consistent bleaching of tooth stains and discolorations. Whitening gel quickly and safely removes stubborn stains due to coffee, tobacco, red wine, tea, foods, yellowing from age and more. Most people see noticeable whitening results after the first treatment. Experience a radiant smile without an expensive trip to the dentist. CAUTIONARY: The 44% Carbamide Peroxide strength whitening gel is the highest strength peroxide-based bleaching product available. It has the potential to irritate gums or cause moderate tooth sensitivity for some users, especially if too much gel is applied to dental trays. Use whitening syringe nozzle to apply small dots of gel along dental tray impression and then spread gel evenly across impression using syringe nozzle. The gel will expand when activated and any excessive application of gel will result in gel remaining suspended on gums, causing potential irritation. It is highly recommended that users perform short 10-15 minute whitening intervals to start in order to ascertain tolerance to the 44% whitening gel. The following is recommended to address gum or tooth sensitivity issues: Decrease the duration and/or frequency of treatments allowing gums to recover between treatments. If you are considering peroxide based teeth whitening for the first time, you might want to purchase a lesser strength whitening gel-like 35%. Our Teeth Whitening Gel is generally safe for your sensitive teeth and gums, because of its ingredients.  Most clients do not experience sensitivity, but if you have not whitened before, please consult your dentist before using. The Teeth Whitening Gels will remove all cigarette, coffee and tea stains that have been formed through the years. Our Priority Get the Bright White Smiles Teeth Whitening Gels and try it out. It’s easy to use, If there is something, ANYTHING that you don’t like, let us know and we will give you a solution.