What glue should I use?

Dear all,

Please help me to fix this. The plastic frame near the Volume rocker on my Xperia Z4 tablet is coming out. I ordered my Xperia Z4 tablet from Amazon to Ghana. I did this purely because it is very difficult to find Sony phones/tablets here. The tablet was brand new out of box. This issue was minimal out of box but has started widening up.

I need solutions asap. There is no local support here. I learnt from somewhere that using a glue by name B-7000 will keep it together. I want to know if anybody has an idea about the kind of glue Sony used on the Xperia Z4 tablet so that I can order same to repair this myself. Thanks in advance

Please check the picture at the link below.

https://app.box.com/s/xnujmte35l9yrnsnkt...