Conveen Security Self-Sealing Male External Catheter. Conveen Security offers a skin friendly alternative to traditional latex male external catheters. Not made with natural rubber latex. Conveen Security is a self-sealing male external catheter that is not made from natural rubber latex, eliminating the risk of latex induced allergic reactions and development of latex sensitivity. Features: Anti-kink bellows end push ring for secure connection to a urine bag. Applicator grip and roll-out strip for easy, smooth roll-out and secure application. Not made with natural rubber latex.