From the manufacturer's website:
Kank-A® Mouth Pain Liquid is ideal for treating canker sores and other abrasions inside the mouth. Kank-A Liquid delivers maximum strength medication while forming a long-lasting barrier that protects.
Kank-A combines the maximum allowable level of anesthetic for fast, temporary pain relief, with a film forming agent for long-lasting protection. Unlike most products which quickly wash away, Kank-A’s coating holds the anesthetic in contact with the sore and acts as a barrier against further irritation.
Kank-A liquid also includes an integrated applicator allowing for accurate, mess-free delivery of medication every time – no fingers, swabs, etc. required.
This Product includes a bonus Blistex Medicated Lip Ointment Tube.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.