ns2121Product Data Sheet Sarnacol®-2121 (US) November 2021, Version 03.01 020945072000000036 PRODUCT DATA SHEET Sarnacol®-2121 (US) WATER-BASED ADHESIVESarnacol®-2121 (US) is a water-based dispersion adhesive used for Sarnafil® or Sikaplan® roofing systems. Sarnacol®-2121 (US) is formulated for adhering membranes as a wet lay in to