Abstract: A fastener sleeve is described, including a collating sleeve body and a plurality of cylindrical sheaths in the collating sleeve body, each cylindrical sheath engageable with a fastener. A sheathing panel is also described, including at least one barrier overlay secured to a panel, a plurality of fasteners engaged in the barrier overlay and the panel, a plurality of sealing cylindrical sheaths surrounding a portion of each fastener and positioned between the fastener and the barrier overlay, such that the sheathing panel has at least one of the following properties: a water vapor transmission rate of at least 7.0 grams/m2/24 hours at 73° F. and 50% relative humidity (RH), a water vapor permeance of at least 1.3 perms at 73° F. and 50% RH, or an air infiltration rate of less than 0.2 L/s-m2 at 75 pascals. A method of engaging the fasteners with the panel is also provided.