The key here is “based on Portland cement”, which is generally has water repellent added to it making it water proof.
Normal cement, concrete .. Is a different story.
Normal cement, concrete .. Is a different story.
It is generally macro-waterproof, however, unless there are large cracks.
'Concrete' is a combination of sand, cement, water and aggregate, that cures together to form.
When the water migrates away from the curing concrete, it leaves open pores behind that future moisture can move through.