Simple yes, but messy if you have never done it before. There are trades that can do this for you - try Facebook marketplace. Use the same silicone to cover…

Caulk the glass in with silicone. The aluminium also needs to be filled at the gaps. The rubber seals have been stretched when the window was assembled and they…

Hi
How old are these windows & what brand are they? Should be on the pull handle.
The simple solution is to remove this glazing rubber on 2 edges of each glass…