Page 14 - WEB-I3 Insulating Glass Fabrication Supplies and Equipment

SECTION 2 FHC INSULATING GLASS FABRICATION, SUPPLIES, AND EQUIPMENT
FHC IG Fabrication Methods Bulk Quantities Available
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Sealant Application for

Single Sealed Unit

FHC IG877 Silicone Foam and
Metal Spacer I.G. Sealant

FHC Item No. 1G877 Sealant does not
require mixing and is ready to dispense
directly from the cartridge.
Glass Panels
Clamping Units:
Ensure that glass units Pane Interspace
are clamped on all sides to (Filled with Gas)
ensure a tight seal. You can FHC IG877 Sealant Application:
use Spring Clamps with Apply FHC IG877 Sealant using a Spacer
vinyl-coated jaws for this purpose. caulking gun (See Page IG38) and a
sealant guide tip (See Page IG30). Primary Sealant
(PIB)
When sealing multiple units, you can stack
them using wood blocks as separators. After curing, remove excess sealant Desiccant
Start with the largest unit at the bottom. using a razor blade (Item No. RB9). Secondary
Position the separators about 1" from the Sealant
edges and 4" from the ends. Ensure that the sealant has completely Sealant to Flush
filled the back-set and is flush with the to the Edge of
glass edges. the Glass
For smaller double-hung window sizes
where all units are the same size, place a
large piece of paper between each unit to
prevent contact.

Bulk Gun Application:
If you’re using a bulk gun, load the sealant
into the gun and apply it to the edges of
the unit.

Ensure that enough sealant is applied to Check for Newton Ring:
penetrate into the shoulders of the spacer Inspect the bottom units of the stack
to create a proper seal. for a “Newton Ring” effect in the
center of the unit. This occurs when
Avoid using so much sealant that it two pieces of glass are in contact.
displaces the spacer. Focus on applying
extra sealant to the corners, which are the If you observe a Newton Ring, flip
most vulnerable areas of the unit. the affected units upright and repair
Hand Application of Two-Part Sealants: them before transport to prevent
permanent rub marks.
If applying sealants by hand, use a putty
knife to apply the sealant to the edges, Following these steps will help ensure
following the same precautions. a proper seal and the longevity of
your insulating glass units using
FHC sealant.

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