What silicone to use for our garden beds overflow pipe / reservoir connection?

ChatGPT is suggesting Selleys 401 RTV from bunnings, but I can’t see anywhere saying that this is food grade approved or safe for potable water.

Perhaps this is sufficient though as it is just in the reservoir part?

I am interested in any feedback here, ie should I look elsewhere for food grade approved silicone elsewhere or just go to bunnings.