Guys, Tomorrow I will be (begin) replacing my main line (cast iron, circa 1970) with PVC. Question: What would be the proper method and/or material I should use to seal the foundation penetration? Concrete BLOCK wall w/crawl space. No basement. That area usually stays a bit damp. I get some seepage after moderate rain. Gets wet along that section after heavy rain. No standing water (outside) after rains, has adequate run-off/drainage away from the house.