EFCO S5900 Outside Glazed - Manual (Page 10)

EFCO CORPORATION 6/2012 PART NO. Y350 Page 10 of 16
Series 5900 Outside Glazed Curtain Wall Installation Instructions
Section VI: Joint Plug Application
Joint Plug Application
A.) Install the thermal isolator (70
Durometer) in the vertical mullion.
Run continuously and butt joint as
required with sealant.
B.) Seal vertical gasket raceway X 1” high prior to installation of
joint plugs.
Note: All thermal isolators
should be removed from
the reels and allowed to
shrink prior to installation.
Install thermal isolator
prior to installing the
mullion plug.
Prior to installing the
mullion plugs, seal all three
sides of the pocket, making
sure all cavities are filled.
With sealant in place, mullion plugs
can be installed. Note the mull plug
is applied so that notch is located at
the pressure plate gasket location.
(Seal all three corresponding sides
of mullion plug before installation so
sealant on mullion plug will marry to
sealant that is placed in the pocket.)