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DuPont™ Thermax™ Heavy Duty Insulation

Durable, Glass-Fiber-Reinforced Insulation with Thermoset-Coated Aluminum Facer

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DuPont™ Thermax™ Heavy Duty Insulation

Durable, Glass-Fiber-Reinforced Insulation with Thermoset-Coated Aluminum Facer

<br><b>DuPont™ Thermax™ Heavy Duty Polyisocyanurate Insulation</b> is designed as an insulation and interior finish system for walls and ceilings in metal, wood post frame, and concrete or masonry buildings, as governed by building codes. <br><br> <b>Thermax™ Heavy Duty Insulation</b> is designed with a glass-fiber-reinforced polyiso foam core, featuring durable aluminum facings: 4 mil embossed white thermoset-coated aluminum on one side and 1.25 mil embossed aluminum on the other. This tough insulation is ideal for moderate-impact areas and can withstand pressure washing up to 2,000 psi with a 15-degree or greater spray tip at a minimum distance of 3 feet. It meets USDA requirements for incidental food contact materials, making it suitable for surfaces like floors, walls, and ceilings. <br><br> Additionally, <b>Thermax™ Heavy Duty Insulation</b> offers high, long-term thermal resistance. Its facers prevent water and vapor intrusion, stabilizing the insulation at a higher R-value. When used with the appropriate joint closure system, its low perm rating helps reduce moisture condensation within and behind the insulation.
 
 
 
 
 
 

Features & Benefits 

 
 
 

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Ease of Installation
  • Installs quickly to walls and ceilings, inside and outside of purlins, trusses or bar joints.
  • Can be installed exposed to the interior without a thermal barrier.
  • Is lightweight, easy to cut, handle and install.
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High Performance Durability
  • FM 4880 Approval up to 3".
  • R-Value of 6.9 at 1" thickness.
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Moisture Resistant
  • Helps reduce the potential for condensation within the wall assembly.
  • Pressure washable up to 2,000 psi.
 
 
 

Specifications

 
 
 

Standard Sizes

Thickness Width Length R-Value Edge Treatment
1.0 in. 4 ft. 8 ft. 6.9 Square Edge
1 1/2 in. 4 ft. 8 ft. 9.9 Square Edge, Shiplap
2.0 in. 4 ft. 8 ft. 13.0 Square Edge, Shiplap
2 1/2 in. 4 ft. 8 ft. 16.0 Square Edge, Shiplap
3.0 in. 4 ft. 8 ft. 19.0 Square Edge, Shiplap

Note: Please be advised that additional sizes may be available. Availability of all sizes varies by region and is subject to change. For further information, please contact your local DuPont Sales Representative or call us at 1-866-338-7668.

 
 
 

Testing

<b>Thermax™ Heavy Duty Insulation</b> exhibits the properties and characteristics indicated in the table below when tested as represented. Review all instructions and (Material) Safety Data Sheet ((M)SDS) before use. Please contact DuPont at 1-833-338-7668 when additional guidance is required for writing specifications that include this product.

TEST METHOD TEST TITLE PROPERTY RESULTS
FIRE
UL 723 Test Method for Surface Burning Characteristics of Building Materials Surface Burning Characteristics1 Flame Spread ≤ 25
Smoke Developed ≤ 450
Core and Finished Product
UL 1715 Standard for Safety Fire Test of Interior Finish Material Fire Progagation - Interior Pass
NFPA 285 Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Wall Assemblies Containing Combustible Components Fire Progagation - Exterior2 Pass
NFPA 286 Standard Methods of Fire Tests for Evaluating Contribution of Wall and Ceiling Interior Finish to Room Fire Growth Fire Progagation - Interior Pass
NFPA 268 Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source Ignitabiilty - Exterior Pass
THERMAL
ASTM C518 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus Thermal Resistance 1 inch @ 75°F mean temp3 6.9 ft2
•h•°F/Btu, R-value, min.
ASTM D2126 Standard Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging Dimensional Stability 0.2% linear (length & width)
STRENGTH
ASTM D1621 Standard Test Method for Compressive Properties of Rigid Cellular Plastics Compressive Strength4 25 psi
ASTM C203 Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation Flexural Strength 75 psi
ASTM D1623 Standard Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics Tensile Strength 500 psf, min.
AIR
ASTM E2178 Standard Test Method for Determining Air Leakage Rate and Calculation of Air Permeance of Building Materials Rate of Leakage <0.001 L/s*m2, max
ASTM E2357 Standard Test Method for Determining Air Leakage Rate of Air Barrier Assemblies Air Leakage No Leakage
WATER
ASTM E96 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials Water Vapor Permeance. 0.01 perm
ASTM C209 Standard Test Methods for Cellulosic Fiber Insulating Board Water Absorption 0.1% volume, max.
ASTM E331 Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference Water Penetration Pass

1Calculated flammability values for this or any other material are not intended to represent hazards that may be present under actual fire conditions.

2See Jensen Hughes engineering judgement

3R-value of 1.0-inch of foam measured @ 75°F mean temperature, determined in accordance with ASTM C518 after aging for 90 days @ 140°F.

4Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

FAQ

Is there a paint color formulation to match DuPont™ Thermax™ Brand Insulation white acrylic-embossed insulation boards (DuPont™ Thermax™ White Finish NH Insulation, DuPont™ Thermax™ Light Duty NH Insulation and DuPont™ Thermax™ Heavy Duty Insulation)?
Yes. Customers from anywhere in the United States can obtain the paint color match for Thermax™ white acrylic-embossed insulation boards at any Sherwin-Williams paint store nationwide. No primer is required, and usually one coat will be sufficient; however, two coats also appear satisfactory. Apply the paint with brush, roller or spray.

Ask for: 1. Sherwin-Williams DTM Acrylic Coating B66 W1151 Semi Gloss Extra White 650827181 2. PPG High Performance Coatings: PITT-TECH® PLUS SG 4216 HP White Base

Can DuPont™ Thermax™ Heavy Duty Insulation be washed with a spray/power washer?
Yes. The following table outlines the conditions under which these Thermax™ Brand products can be power washed.

Allowable Spray Pressure, psi (MPa) Thermax™ White Finish Thermax™ Light Duty Thermax™ Heavy Duty
1000 (6.9) Any spray tip greater than 15 degrees, 3 feet minimum distance from the surface Any spray tip greater than 15 degrees, 3 feet minimum distance from the surface Any spray tip15 degrees, 3feetminimum distance from the surface
2000 (13.8) Not Allowed Not Allowed Any spray tip greater than 15 degrees, 3 feet minimum distance from the surface
Caution: Prolonged spray at board joints will cause facer to become disbonded from the insulation board. Always point nozzle perpendicular to board surface no closer than the minimum distance.

Can DuPont™ Thermax™ Brand Insulation be left exposed to the building interior?
Thermax™ Brand Insulation products can be left exposed to the building interior (i.e., without a thermal barrier such as 1/2 inch gypsum wallboard) in specific non-rated ceiling assemblies or non-rated construction in commercial, industrial and agricultural buildings. Thermax™ Brand Insulation products cannot be left exposed to exterior conditions.

The use of Thermax™ Brand Insulation exposed to the building interior is documented with a Code Compliance Research Report (CCRR-0440).

NOTE: Thermax™ cannot be used as a duct work or plenum insulation- it does not meet the IBC /IMC for flame spread of 25 or less and smoke developed of 50 or less

How much does DuPont™ Thermax™ Heavy Duty Insulation weigh?
0.216 lb/ft2
To get weight of 1 inch x 4 feet x 8 feet board multiple the value by 32
Example: Thermax™ Heavy Duty Insulation 1in x 4ft x 8ft weighs (0.216 x 32) = 6.9 lbs
What are the ASTM C1289 classifications for DuPont polyisocyanurate products ?
The ASTM C1289 classifications for DuPontpolyisocyanurate products are as shown below:
ASTM C1289 Types Products
Type I, Class I Tuff-R™ Insulation (< 1')
Type I, Class 2 Tuff-R™ Insulation (≥ 1')
Type I, Class 2 Thermax™ Basic NH Insulation
Type I, Class 2 Thermax™ Heavy Duty Insulation
Type I, Class 2 Thermax™ Light Duty NH Insulation
Type I, Class 2 Thermax™ XARMOR™ (ci) Exterior Insulation
Type I, Class 2 Thermax™ Metal Building Board NH Insulation
Type I, Class 2 Thermax™ White Finish NH Insulation

Type1 - Faced with aluminum foil on both major surfaces of the core foam. Class 1 - Non-reinforced core foam. Class 2 - Glass fiber reinforced core foam. Dimensional stability will be greater than Class 1 when fastened properly. ASTM C1289 Class 2 exceeds Class 1 requirements.

 
 
 
 
 
 

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