Sealing empty conduit/lining pipe in the floor slab

Hello,
I have laid one KG pipe each as a conduit or sleeve for the telephone cable and power cable through the floor slab in the utility room. How and where do you seal the cable that is later pulled through there? With one of those rubber sealing sleeves (doyma). And specifically in the utility room and/or outside in the soil? Do you seal both ends of the pipe? Or do you leave it open towards the soil so that condensate or similar can drain off? At the moment, there is some water in the pipes, hence my question. I want to pull the telephone cable in myself. But of course, I don’t want any connection to the outside to avoid attracting odors or little animals.

Thanks,

Denny

Why didn't you choose a multi-utility connection? All the lines can go in there (telephone, electricity, gas, water, cable TV), sealing is then also not an issue.