Installation Guide

• Now that last row of blocks have been installed, slide short
pieces cut from the Thinline
™
Track spacers into the gap
between top of blocks and half-channel previously installed,
if space permits.
• Apply a
1
/
4
” bead of sealant horizontally across the top of the
rough opening (
1
/
2
” from exposed edge).
• Then apply a
1
/
4
” bead of sealant horizontally across the top
inside edge of the other half of channel and slide it into place
wedging it between the spacer and the top of the rough
opening (Illus.L) (you may need a piece of tape to hold the
channel in place until the sealant sets).
K
7. Seal The Joints
Option 1 – Sealant Joints Finish:
• Follow APPLICATION instructions on the glass block sealant
tube to open the tube. Coverage rate is one tube per sixteen
(16) blocks. The sealant skins over in 15-17 minutes. Don’t
seal more joints than can be tooled in approximately
17 minutes. Practice the sealing technique before starting.
L
• Seal the horizontal joints first, pulling the tube through the
joint. Slightly over fill the joint. See illustration (Illus. M).
• Use the spoon-shaped finishing tool and push it over the
joints at an angle to collect the excess sealant and seal the
joint. Periodically wipe the sealant from the joint finishing
tool bowl (Illus. N & O).
• Remove any excess sealant from the block faces with the
side of your finishing tool.
• Use the same method to fill the vertical joints. Carefully
work the joint intersections to create a smooth finish.
Repeat this procedure to seal the opposite side of the panel.
• Do not use the back of the finishing tool to smooth joints.
This will only smear the sealant.
• Allow the sealant to cure 48 hours before putting any stress
on the panel.
• For all exterior panels and panels exposed to water, run a
bead of sealant between the perimeter channels and the
face of the blocks. Also, between the perimeter channels
and the framing. Use the joint finishing tool to seal these
joints. Remove excess sealant.
• The piece of perimeter channel along the top (which was
wedged in place earlier) must always have a bead of sealant
applied between the channel and the frame.
N
O
M
Q
Thinline
™
TRACK
SPACER
GLASS
BLOCK
SEALANT
Q
Q