I recommend GE SCS1200 series. Very high tensile strength and used by many aquarium manufacturers. I have a few 10oz cartridges (black) in stock. This stuff is contractor grade and unfortunately not available at home centers. Whatever route you go make sure it is 100% silicone with an acetic cure and approved by the FDA as good safe. No moldewcides or microban. Practice makes perfect on the bead size and spread, my advice is to put down no more than 1/4" bead and "finger" only once if at all possible. Use a rag to whipe off excess after each swipe. Good luck!