NAC Products invented self-adhering, sheet-applied, thin-bed crack isolation membrane technology. Today, ECB (anti-fracture), Strataflex (waterproofing) and SAM3/Super SAM 125 (sound abatement) membranes are proven performers beneath millions of square feet of decorative floor surfaces. Renowned for ease of use, NAC Membranes are #1 architecturally specified, #1 lab and field tested and #1 contractor/owner approved. They offer unsurpassed lateral crack suppression, proven effectiveness against Moisture Vapor Transmission (10#/1000SF/24HRS), and meet ANSI A118.12 and A118.10 and A118.13. Contact us to learn more about these time tested solutions from an industry pioneer as well as our new SubSeal Liquid Waterproofing and Crack Suppression Membrane. We take pride in our exceptional technical and customer service. If you have any questions please contact our staff at 800.633.4622 or visit www.NACproducts.com. We look forward to working with you in the future