I have a custom 1/2 tempered glass splash guard 59 long by 64 tall. I plan on attaching it to the wall with 3 clamps and only Silicon to attach to the heated floor. No cross member to steady the free corner of the panel. I realize it's probably not ideal to do this however I'm looking for the best Silicon option to immobilize the panel. To reduce the weight I will be trimming off a triangle piece of glass starting at about 36 inches from the wall at the top angling to the bottom at about the 24 inch mark at the free side. Any suggestions for the best mold resistance and strong Silicon to use?