Parkell, Inc.’s fluoride-containing desensitizer, Pain-Free™ F, gives clinicians a quick and easy way to provide long-lasting comfort to patients with tooth hypersensitivity. Just like Parkell’s original Pain-Free Desensitizer, the clinician simply applies Pain-Free F to sensitive dentin to create an effective shield that blocks out external stimuli and eliminates sensitivity. Pain-Free F contains fluoride for excellent tubule occlusion.