September 10, 2010, Newsletter Issue #139: Bentonite Waterproofing Systems

Tip of the Week

Natural clay systems, known as bentonite act as waterproofing by swelling when exposed to moisture thus becoming impervious to water. This swelling can be 10 to 15 percent of the thickness of the base material. Clay panels and sheets are popular for use in blind-side waterproofing applications such as on retaining earth systems and elevator and sump pits.

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