EFCO 525 Series - Manual (Page 30)

SECTION VIII-FRAME INSTALLATION
[FIG. 38]
SEAL
[FIG. 39]
SNAP
A. SCREW SPLINE
(CONT.)
PAGE 28
CLEAN IF
REQUIRED
795
SEALANT
CLEAN OFF
ANY EXCESS
SEALANT
STEP 5) SEALING SCREW SPLINE VERTICAL MULLIONS
525 IMPACT RDM 4/2011
Prior to installing an intermediate vertical mullion or perimeter jamb, apply
795 or equivalent silicone type sealant to the vertical mullion in the location
shown in figure 38 below. Both sides of the entire mullion should be
sealed. Apply enough sealant so when the filler or opposite mullion half is
snapped, it will create a good seal. Wipe off excess sealant from the
exterior if required. This sealant practice should be used for screw spline
vertical mullions only.