Definitely not. Apart from fat transfer techniques used in Brazilian butt lift, the only substances that can legally be injected into the buttocks to increase volume are hyaluronic acid gels. Unlicensed facilities are known to advertise injections of substances that have not been approved by the U.S. Food and Drug Administration, nor recommended by any reputable doctor. Injections of substances such as non-medical-grade silicone can result in outcomes that range from disappointing to tragic. You should never consider any procedure not performed by a highly trained, board-certified plastic surgeon.