• Maximum strength (5% lidocaine).
• No effect on ink - doesn't include vasoconstrictors like prilocaine.
• Safe to use around sensitive areas (pH neutral).
• Lasts 2-3 hours. Safe to reapply after skin has broken to extend numbing sensation.

* NOTE: Check your state regulations regarding the use of numbing products. Many states such as Texas  prohibit the use of topical anesthetics that exceed 4% lidocaine.