Caulk here.
Bottom Track
5. Caulk and Install the Bottom Track
Apply a bead of caulk or sealant in the front groove on the underside of the bottom track.
Apply a second, smaller bead of caulk or sealant to the other edge on the underside of the bottom
track.
Install the bottom track on the ledge at the marked location.
1054388-2-D
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Sterling