/diy/ - Do It Yourself

There are 4 unused penetration pipes through my foundation completely open. As well as wood blocks that were left from the pour. What the hell were they thinking? leaving all these gaping open for water and bugs to come in? My question for you. What product do I use to fill them and does it need to be filled from the exterior? I've already dug a ditch alongside the foundation wall on the exterior as i'm putting in a drainage system. So might as well fill these while it's open. I'd like to seal my sewer line penetration as well but don't want to fuck up anything. As for the boards, drill them out and fill it with same product?