Page 17 - WEB-I3 Insulating Glass Fabrication Supplies and Equipment

FHC INSULATING GLASS FABRICATION, SUPPLIES, AND EQUIPMENT SECTION 2
FHC IG Fabrication Methods Bulk Quantities Available
Click to Chat With Us
Dual Seal Unit Fabrication

Polyisobutylene Primary Seal, Two-Part Polysulfide,
and Urethane Secondary Seal Method

When fabricating a dual seal unit with Bulk Gun Application:
FHC products, follow these steps: Load the sealant into a bulk gun and
apply it to the unit edges.
PIB Tape Application: Ensure adequate sealant to penetrate
Apply PIB Tape to one side of the the spacer shoulders for a proper seal.
assembled spacer frame. Avoid excessive sealant that may
Set the spacer on the first clean glass displace the spacer. Focus on applying
lite, maintaining a 3/16-inch gap extra sealant to the vulnerable corner
between the spacer and the glass edge. areas. After curing, remove excess
Apply PIB Tape to the facing side of the sealant with a razor blade, taking care
spacer, ensuring an even sight line. not to damage the edge seal.
Place the second clean glass lite on the
spacer with square and even corners,
using weights to compress the PIB Tape
for a good seal.

Sealant Mixing:
Thoroughly mix the base compound and
accelerator as per FHC’s specified ratio
using a spatula or low-speed mechanical
mixer. Mix only the required amount
for the units to be assembled. The
mixed material typically has a one-hour Glass Panels
application life at 70°F (21°C).

Unit Clamping:
Ensure a tight seal by clamping the
glass units on all sides using spring Spacer
clamps with vinyl-coated jaws. When
sealing multiple units, stack them with PB
separation using wood blocks or paper.
Place wood blocks about 1 inch from the Desiccant
edge and 4 inches from the ends. Begin Secondary
with the largest unit at the bottom. If Sealant
the units are the same size, use paper
between them, but do not stack more
than 15 larger units.

Check for Newton Ring:
Inspect the bottom units of the stack for a “Newton
Ring” effect in the center of the unit. This occurs when
two pieces of glass are in contact.
If you observe a Newton Ring, flip the affected units
upright and repair them before transport to prevent
permanent rub marks.

Following these steps will help ensure a proper seal
and the longevity of your insulating glass units using
FHC sealant.

Visit fhc-usa.com to search for
IG Kits FRAMELESS HARDWARE COMPANY LLC
4361 Firestone Blvd. South Gate, CA 90280
Enter the Item Number or scan QR code with Toll Free: (888) 295-4531 | Direct: (323) 968-2031
your smartphone for complete product details IG17
Fax: (323) 336-8307 | fhc-usa.com