EFCO 526 Series - Manual (Page 33)

EFCO 6/2012 Page 33
Series 526 Impact Installation Instructions
Prior to installing an intermediate vertical mullion or perimeter jamb, apply silicone type seal-
ant to the vertical mullion in the location shown in figure 28 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.
SECTION VII: Frame Installation
Step 5) Sealing Vertical Mullions
[Fig. 29]
Clean off any excess
sealant at both
interior and exterior.
[Fig. 28]
Sealant at both
interior & exterior
Prior to applying sealant to the required areas, clean the area with Isopropyl Alcohol and a clean towel
that will not leave towel materials behind. Wipe off material with a sufficiently dampened towel to remove
all dust, oil, and cutting fluids from the required areas. Allow to air dry before applying any sealant.