Raynor Garage Doors -ThermaSealâ„¢ TM300 Insulated Steel Sectional Door

ThermaSeal® TM300

Sectional Insulated Steel Door

The ultimate choice for thermal protection is the Raynor ThermaSeal TM300 sectional insulated steel door with an 24.54 R-value.

Category: commercial garage doors | insulated garage doors | metal garage doors...

MasterFormat: Specialty Doors and Frames | Panel Doors | Sectional Doors

Raynor Garage Doors
P.O. Box 448
1101 East River Road
Dixon, IL 61021 -0448
Tel: (800) 472-9667
Fax: (815) 285-7144



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ThermaSeal™ TM300 Insulated Steel Sectional Door

ThermaSeal® TM300

Sectional Insulated Steel Door

The ultimate choice for thermal protection is the Raynor ThermaSeal TM300 sectional insulated steel door with an 24.54 R-value. This 3″ thick commercial door model is the most energy efficient in the ThermaSeal line.

Ideal for commercial warehousing, agriculture, fire station and ambulance bays, refrigerated buildings, underground parking, and high-security facilities.

TM300 Features and Options

Raynor ThermaSeal TM300 commercial doors are available with numerous features and options, including those listed below.

Maximum Thermal Protection

Energy-saving polyurethane foam insulation is used to deliver exceptional R-values.

Rugged Hardware and Springs

Your ThermaSeal door comes packaged with the right combination of long-lasting hardware, track, and springs to precisely match your door’s size and application.

Reduced Airflow

Dual vinyl barriers dramatically reduce air infiltration. A true thermal break prevents heat loss and eliminates any metal-to-metal contact between surfaces.

Decreased Energy Costs

ThermaSeal doors help you reduce energy costs with a U-shaped, vinyl bottom weatherseal and sturdy aluminum retainer.

Choice of Windows

Select either 24″ x 8″ (shown), 24″ x 12″, or 34″ x 16″. ThermaSeal doors are also available with aluminum fullview window sections. Choose from a variety of insulated glass, acrylic, tempered and polycarbonate styles to suit any application.

High-cycle Counterbalance Systems

For reliable operation in high-traffic areas, choose high-cycle torsion springs with 25,000, 50,000 or 100,000-cycle life.* For reduced maintenance and ultra-smooth operation in heavy-use applications, choose a weight counterbalance system. *Some options may be limited to door size or model.

Customized Track and Hardware Systems

Track systems are supplied to fit special clearances, inclines or contour applications. Hardware and track systems can be designed to fit any need. Additional trussing is available for special wind loading applications.


In applications where control and access are important, choose from a variety of locking options to help keep your building secure. Locks come in both inside and outside variations.

Carbon Monoxide Vent

Allows you to channel fumes to the outside when the door is closed. Available in a variety of sizes.

Removable Center Posts

Carry-away and swing-up options are available for extra-wide openings. Ideal for agricultural or airplane hangar applications.

Pass Door

Pass doors conserve energy by allowing entry door access without the full operation of the garage door and minimize wear and tear by conserving cycle life.

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Product Details
TypeCommercial Sectional Garage Doors
ModelThermaSeal TM300
Size40′ x 22′ Max
OperationManual, Motor or Hand Chain
Construction3-Layer Sandwich
Surface TextureStucco Exterior pencil groove, Stucco Interior pencil groove
Section JointTongue-Groove
Section Thickness3″
GaugeSteel; Exterior: 26-Gauge; Interior: 26-Gauge
InsulationNeuFoam ™ Polyurethane (24.54 calculated R-value)
SealsThermal Break, Bottom Seal (3″ Vinyl, 4″ EPDM, or 3″ Yellow); Optional Header Seal.
Trussing20 P.S.F. Wind Load (designed 13.3); Material: U-bar Trusses 4″, 6″, or 8″ sizes. No Ubar required up to 20′ 2″ wide.
Panel ConfigurationNA
ColorWhite, Frost White, Beige, Sepia, Brown
Windows24″ x 8″, 24″ x 12″, rigid frame full-view window in 34″ x 16″, or full-view aluminum section. Choose from clear insulated glass and clear insulated tempered.
TypeNormal Headroom, Rear Mount Low Headroom, Front Mount Low Headroom, Lift Clearance, Vertical Lift, Incline, Contour
Size2″ or 3″
GaugeMinimum 16-gauge
Counterbalance SystemCounterbalance System
TypeTorsion Spring, Tandem Shaft Torsion Spring, or Weight Counter-Balance
SpringsSpring Inner Diameter: 2-1/4″, 3-1/2″ or 5-1/2″; Duplex or High Cycle (25K, 50K, 100K)
ShaftsTube (13 gauge) or Solid (D-Shaft, 1″ Keyed, 1-1/4″ Keyed)
Hinges11, 13, 14-Gauge or Hybrid
RollersStandard or Heavy Duty
LockInterior Slide Lock or Exterior Lock Bars
Seal(s)Header Seal or Jamb Seal
Hanger Angle11, 13, 16-Gauge
PostsSwing-Up or Carry-Away
Technical Information
Section and Panel Schedules
Door Width Number of Raised PanelsDoor Height Number of Sections
5′ 3″ - 9′ 2″2Up to 8′ 2″4
9′ 3″ - 12′ 2″38′ 3″ - 10′ 2″5
12′ 3″ - 16′ 2″410′ 3″ - 12′ 2″6
16′ 3″ - 20′ 2″512′ 3″ - 14′ 2″7
24′ 3″ - 28′ 2″716′ 3″ - 18′ 2″9
20′ 3″ - 24′ 2″614′ 3″ - 16′ 2″8
18′ 3″ - 20′ 2″10