SoundSentry STC 40

The acoustic vertical door!


The SoundSentry STC 40 is a secure sound-damping door with superior insulation

  • Sound Transmission Class (STC) 40
  • Testing of acoustic doors complies with recognized industry standards
  • Extra robust 16ga. steel skins
  • Smooth finish. Custom paint with choice of color from the RAL color chart
  • Superior thermal insulation performance with polyurethane foam core
  • Recommended when headroom is available. Options of vertical lift, high lift or standard lift track configuration
  • Optional electric operation with activation and safety accessories
Sound Transmission Class (STC) 40

In accordance with ASTM E-413 (Classification for Rating Sound Insulation)

STC 40 

4” (100 mm) thick.

Panel manufacturing process

The inner core consists of rigid polyurethane, foamed-in-place under high pressure between two 16ga. steel skins.

STC Panel structure 

CFC-free rigid foamed-in-place polyurethane. 2.56 lbs/ft3 (41.0 kg/m3) minimum density.

 CFC Free 4 inches
Metal skins and finish

16ga. steel skins. Smooth finish. Custom paint with choice of color from the RAL color chart.

color chart 
  • Tongue-and-groove joint with a true thermal break of 2 ¾” (68 mm) and a double bubble-shaped seal.



  • Flexible PVC gasket seal, triple-lip, retained in an extra robust extruded aluminum retainer.



  • Bottom gasket seal, Double U-shaped, flexible PVC gasket seal, retained in a heavy duty extruded aluminum retainer, securely fastened to the bottom of the door.

 sentry joint tongue groove

industrial garage pweatherseal

double u


3” industrial hardware, model 80-T.

Electric operator

Side mounted “Jackshaft” motor, model XTRA-HHD. For electric accessories and their corresponding options such as push button, control stations, radio controls, magnetic loop detector, motion detector, safety edge, utility switch, time delay, closing timer etc., please consult Operators – Thermostop Industrial Doors brochure.