Dryvit Backstop products are designed for use with Dryvit Systems as well as other building cladding systems. Backstop is available in a Dry Mix polymer modified cementitious formulation as well as in two noncementitious liquid versions. Backstop can be applied in a variety of methods depending upon the product selected. When used with the Dryvit AquaFlash® System or Dryvit Flashing Tape™, Backstop NT provides exceptional air barrier and water-resistive membrane for most substrates.