Decoseal® is a warm edge insulating glass spacer system offering all-in-one sealant and spacer application. Decoseal is designed to accommodate and support a center lite of glass or decorative panel, thereby reducing the assembly steps necessary in the fabrication process of triple glazing.


  • All-in-one simplicity.
  • Concentrated desiccant layer provides rapid dew point development.
  • Very low moisture vapor transmission rate.
  • Thermally broken edge seal system: 4X more efficient than aluminum spacer bar.
  • Reduces the risks associated with conventional methods of triple fabrication.
  • Low profile to accommodate secondary sealing or structural reinforcement in large lites.
  • Significant improvements gained in production capabilities.
  • Ability to easily incorporate high performance glass and gas options.
  • Imprinted for product authenticity.
  • Airspaces:
Groove Groove Width (inches) Groove Depth for airspaces under 1/2" (12.7mm) Groove Depth for airspaces 1/2" and over (12.7mm)
T 0.176" (4.47 mm) target 0.125" (3.2 mm) 0.140" (3.6 mm)
U 0.220" (5.59 mm) target 0.125" (3.2 mm) 0.140" (3.6 mm)
W 0.280" (7.11 mm) target 0.125" (3.2 mm) 0.140" (3.6 mm)

Decoseal can be used as a single application system with no additional panel support necessary for decorative panels up to 6 sq. ft. (.56 sq.meters). A secondary or structural support may be advisable for panels over 6 sq. ft. (.56 sq. meters), dependent on the weight of the panel insert. Contact Truseal for recommendations.

Performance Norm
Moisture Vapor 
Transmission Rate

0.02-0.03 g H20/100 sq. in. per
24 hrs. for a .020” (.51 mm) film
at 100° F (38° C).
ASTM F 1249
Volatile Fogging
ASTM E 1887
HIG E 2189
CGSB 12.8
Argon Permeance
6-8 cm3/100 in.² per 24 hrs. per
atmosphere as measured on a
.040” (1.02 mm) film at 77° F
(25° C).
ASTM D 1434
Resistance of Compression
of Self-Contained Aluminum

1,300 pounds per linear foot,
when compressed at rate of 2
inches (50 mm) per minute.
Note: The foregoing information is published as general information only. The listed properties and performance characteristics are approximate value and are not part of the product specification.