Stress urinary incontinence can be from having a stiff open urethra that acts like a lead pipe rather than a sphincter. While urethral hammocks are used for this condition, urethral bulking may also be used. Several biocompatible materials have evolved in the market. Durasphere from Coloplast and Macroplastique from Uroplasty are two of the non- dissolvable options available to bulk of the urethral sphincter and decrease the caliber of the lumen. This allows the mucosal walls to coapt and acts like a road block to passive loss of urine, as well as, leaking from slightly higher pressures.