Glue + soda

I broke a piece of plastic from a key. I tried to fix it using a match so I could melt the plastic but it didnt work very well. Then I searched how to fix something similar and I found this video. I was amazed what you can do with glue and baking soda! I gave it a go to my problem, although the finish wasnt great, it looks the fix is solid. Will see how long it lasts.