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.