If the metal piece at the opening of your Maximus Arena or Maximus Prime came off, we recommend you use a silicone that can withstand temperatures of at least 600 degrees Fahrenheit or higher.
Below is a brand that is nonflammable and suitable for BBQ Grills, etc., and can withstand temperatures up to 1000 degrees Fahrenheit which you can get on Amazon. However, any J-B Weld silicone/paste is what we generally send to our customers as we have found it to be a reputable brand.
➡ J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz