EFCO S5500 Outside Glazed - Manual (Page 35)

EFCO CORPORATION 6/2012 PART NO. Y550
Series 5500 Outside Glazed Installation Instructions
Section VI: Exterior Cover & Drive-In Gasket Installation
STEP #3 INSTALL DRIVE-IN GASKETS IN HORIZONTAL MULLIONS
A. Apply sealant to the vertical gaskets where they will contact the horizontal gaskets on each
end behind the pressure covers as shown below.
B. Cut the horizontal gaskets D.L.O. plus 1/2”, and insert the gasket in place starting at the
center of the D.L.O. Crowd in the excess at the ends. Install the gasket on the topside of the
intermediate horizontal first to prevent the exterior cover from shifting.
C. Seal all gasket corners, and butt the joints as indicated below. Remove any excess sealant
that remains.
D. For one piece covers — Tool the sealant that was previously applied to the ends and sides
of the covers in step 2 option B (pages 34-36) and seal watertight. Remove any excess
sealant that remains.
Apply sealant to
vertical gaskets.
Seal all gasket corners by
pulling the horizontal gasket
back, sealing the ends, and
pressing the gasket back
into the vertical gasket.
Tool sealant
watertight.
INTERMEDIATE SHOWN, HEAD AND SILL SIMILAR