Sentinel - Industrial Sectional Doors


The best insulated security door in the industry!

The Sentinel sectional door is without equal the most robust and best insulated sectional door in the industry. The Sentinel sectional door is equipped with 16 gauge steel skins or 20 gauge steel skins and is available with a 2” thick (R-18), 3” thick (R-24) and 4” thick (R-32) polyurethane foam core. The Sentinel sectional door has all the outstanding features of a superior industrial door: high density polyurethane foam core, airtight tongue-and-groove joint, true thermal break with an integral bubble seal (double bubble seal for 3” and 4” thick doors), triple-lip perimeter weather seal with extra heavy-duty aluminum retainer, robust U-rubber bottom seal (double bottom seal for 3” and 4” thick doors), 16 gauge galvanized steel end caps, etc. Due to its dual quality of superior robustness and high insulation value, the Sentinel sectional door is widely used as a security door or as a highly insulated Arctic door that can withstand the harshest weather or environmental conditions.

The Sentinel sectional door is recommended for the following applications:

  • police station
  • detention center
  • military installation
  • high security building
  • government building
  • Canadian Arctic building
  • research laboratorie
  • precious stones & minerals mine
  • pharmaceutical plant
  • high-value goods warehouse
Performance tests
  • ASTM E-283 (Air Leakage): 0.645 L/s-m2 at 75 Pa (0.127 cfm/ft2 at 25 miles/hour)
  • ASTM E-547 (Water Penetration): Absolutely no leak
Size capacity Doors up to 24' wide by 16' high (7315mm wide by 4877mm high)

Thickness and insulation value:


Manufacturing process

2,3,4             inches insulation

2" (50mm) thick.R-18.

3" (75mm) thick. R-24.

4" (100mm) thick.R-32.

The inner core consists of rigid polyurethane, foamed in place under high pressure between two metal skins.

Joint and seal Joint and             sealHigh quality galvanized steel skins roll formed into an exclusive tongue-and-groove joint with a true thermal break and a double-shaped weather seal (single seal for the Mark II models).

Metal skins / Finish

2 options available :

Sentinel 20ga.             steel

20ga. steel :
Thermostop™ Sentinel,
model Mark II-200(2"),
Mark III-200(3")
or Mark IV-200(4")
Finish : White, smooth finish, with ribs.

Sentinel 16ga.             steel

16ga. steel :
Thermostop™ Sentinel,
model Mark II-166(2"),
Mark III-166(3")
or Mark IV-166(4")
Finish : Smooth finish, shop painted color

weather seal
Perimeter seal3-lip, flexible PVC weather seal, retained in an extra robust extruded aluminum retainer.
weather seal
Bottom sealU-shaped, flexible PVC weather seal, retained in a heavy duty extruded aluminum retainer, securely fastened to the bottom of the door.
End caps End capsSections are equipped with 16ga. (1.42mm) thick galvanized steel end caps.
Glazing options Type A

Type A (for the Mark II models only) :
Full view extruded aluminum panel.
Standard anodized finish.

Type B

Type B :
Black square frame.
Double acrylic or 1/8" - 1/8" sealed glass.
Standard 24" x 12".

Type C

Type C :
Black round corner frame.
Double acrylic glass.
Standard 24" x 12".

Type E

Type E :
White square frame windows.
Standard 24" x 12".

Hardware and electric operators

Recommended models (for 10 000 cycles springs) :

  • Up to 12'(W) x 12"(H)
    - Hardware model 80-T with electric motor XTRA-H
  • Up to 16'(W) x 16'(H)
    - Hardware model 80-THD with electric motor XTRA-HHD
  • More than 16'(W) x 16'(H)

Note :
For more information, please consult the and the sections.