JO Prolonger Gel Desensitizer Benzocaine Free 2 ounces from System JO. Maximize pleasure with JO Prolonger Gel. A regular strength gel designed to slow the onset of ejaculation and enhance appearance of the penis with a natural plumping. Apply a small amount during foreplay, toy play or solo-play for added pleasure. Ideal for men who want longer lasting effects with a regular strength formula.