My 10gal rubbermaid mashtun developed an x-shaped crack right in the center of the bottom of the cooler. I really don't want wort getting into the insulation or old water getting in to the wort from this crack. I figure some of you DIY'ers will know of some safe sealants for this crack. I've read that 100% silicone will be safe but I've also read that it won't adhere to the material of the cooler. Any ideas?