PAP+ Primer cannot be used by itself as a whitening treatment, but rather it works with our PAP+ formula to boost it’s performance. The PAP+ Primer is used to prime your teeth and boost the whitening performance of PAP+. Paired with the VIO405 light, this new 3 step process delivers professional whitening results in only 10 minutes PAP+ is our award-winning whitening formula, which has been clinically proven to not cause pain or sensitivity during the whitening process. The active whitening ingredient in our PAP+ formula is PAP (Phthalimidoperoxycaproic Acid), which is a safe and effective alternative to peroxide, that doesn’t release free radicals during whitening. Apply a layer of PAP+ Primer to each tooth. Wait 10 seconds then expel excess before beginning your whitening treatment.