I have had neutocrete in my crawl space for 7 years. It is light but there are no cracks. I am down there a lot. My crawl space was a nightmare. All mud, raining constantly and full of debris from every repair for the last 50 years. I am right by the water so the mud was really soft. You could have used photos as the backdrop for a horror movie. Neutocrete came in and pulled everything out (some places had only 1 foot of height). They cleaned everything. They ran a dehumidifier for a week. Then they applied the neutocrete. They also treated all of the joists. I don't have objective data on the humidity control or radon remediation but it has held up 100% and the house does seem dryer. I still need to do work on the foundation wall to waterproof it.
