Mar-flex Waterproofing and Basement Products
Shockwave is a crush-resistant drainage board that serves as a shock absorber to protect walls during backfill. The board is made from closed-cell, cross-linked polyethylene foam that absorbs pressure and bounces back to its original shape, the company says. It comes in 3-by-4-foot sheets and in thicknesses of 1/2, 1, and 2 inches. 800-498-1411. www.mar-flex.com.