StoGuard® Transition Membrane is a flexible air barrier membrane for use on vertical above grade wall construction over properly prepared concrete, concrete masonry (CMU), glass mat gypsum sheathing and Exterior or Exposure I wood-based sheathing. It is used with StoGuard® waterproof air barrier membranes including Sto Gold Coat®, Sto EmeraldCoat, Sto AirSeal, Sto VaporSeal and Sto ExtraSeal. It is used at detail areas to provide flexible connections to achieve continuity of the air barrier assembly. It also functions as a secondary weather seal at joints in construction.