Columbia Boots Cracking How Can I Repair Cracked Open Rubber Snow/hiking Boots? Something Better Than Super-glue?

How can I repair cracked open rubber snow/hiking boots? Something better than super-glue? - columbia boots cracking

I have a pair of winter boots Columbia (leather, rubber feet), and realized that is when I went to them this year, broken rubber sole, and separated from the top. How it happened I have no idea, but can not afford a new pair! While rubber is isolated within the party, and played the leather. I combine the three materials, as well as sewing and cracking a waterproof rubber. Can someone give me an adhesion promoter or a repair method for these shoes to life? Thank you!