Seal-Tack GO is a water-based, fire resistant, vapor barrier, outdoor coating for most types of thermal insulation, including polystyrene foam. Seal-Tack GO can be used as a top coat for extended UV protection on Seal-Tack G or Seal-Tack AF. This water-resistant coating is non flammable in the liquid state and formulated for both indoor and outdoor applications. The unique physical properties provide an easy to apply material by either brush, roller or spray creating a uniformly coating surface.