Attach bricks

[sawdustmaker]

If you only have a loose brick that needs to be attached (located at the top of a decorative wall indoors), how can you secure it in the simplest and cheapest way?
Is mortar available in the same tubes as other sealing materials?
Or what should you use?

 

[Stefan N]

https://www.paintpro.se/lim-fog-kit...6d5EFRrr5ZNxsKSY0wQwO1ejxXUZu0hBoCIAwQAvD_BwE

 

[sawdustmaker]

[link]

that looks perfect. Thanks!!!