Emshield WFR2 by Sika Emseal features two water-repellant silicone sealing surfaces each adhered to fire-retardant impregnated foam backing. Because of the symmetrical design, either side can face out from an exterior or interior wall and maintain a 2 fire-rating. When either (or both) faces have a field applied band of silicone that face is watertight. Emshield WFR2 is installed into epoxy adhesive field-applied to the sides of the foam and on the joint faces. An optional field injected silicone sealant band seals the bellows to the substrate at the installation surface providing watertightness. Joins between each stick are executed using a field-applied silicone sealant at the bellows' edges of the join and field-applied intumescent sealant on the adjoining faces to the silicone.