The 20H System is a tried and true preformed expanding foam sealant produced by impregnating permanently elastic, high density, open-cell polyurethane foam with an acrylic polymermodified, water-based asphalt emulsion. It is primarily used in below-grade applications. The architectural and engineering community has benefited from 20H System’s performance for over 30 years.
![20H-system-below-grade-joint-seal-for-foundation-walls-by-emseal](https://bapionline.com/wp-content/uploads/2024/03/20H-system-below-grade-joint-seal-for-foundation-walls-by-emseal.jpg)