Liquidcaine is a single "caine" 4% lidocaine solution. It is used to produce numbing within 90 seconds of application and has a fairly short life span once applied. It can be applied during all tattooing, piercing and permanent makeup procedures involving broken skin as well as for electrolysis and laser treatment, and even to relieve the pain of sunburn. Liquidcaine should NOT be used for eyeliner procedures. Care should be taken to avoid getting any anesthetics into the eyes or mouth.