Backstory: The deck was turned into a sunroom, under the deck is a crawlspace with what looks like steel posts on each corner. Cement blocks were placed in between the posts and cement was used to fill the gaps between the cement blocks and the posts. Problem: The cement that was used to fill the gaps between the steel posts and cement blocks has cracked away leaving a space to outside along both sides of the posts. What is the best way to fill the gaps and seal the crawl space? I'll post pictures later tonight, Thanks guys!