Schwalbe Marathon Plus tires .. they put the tire liner puncture protection In the tire casing.

Tire liner strips shift inside the tire with every rotation,
inflation needs to be rock hard to reduce it, grinder wheel tapers the edges of the ends,
I do that when we sell, and Install them in the bikeshop.
that also reduces the wearing a hole in the tube from the end of the tire liner problem.

Reduce, extends the time.. not eliminate.