We believe BB-58 Hypodermic Tissue Builder to be the finest quality hypodermic tissue builder available today. Users tell us that it performs better, will not sag or change regardless of how long the body is viewed. BB-58 is one of our most popular accessory chemical items. Formula BB-58 is designed to congeal on contact with tissue moisture when injected hypodermically.The congealed mass retains sufficient pliability to allow for the proper molding of contours. Once arranged, it will not change.