Insulation

DuPont™ Styrofoam™ Brand Panel Core 20 XPS Insulation

High-Performance Insulation for Composite Panel Applications

U.S. HFC Regulation Compliant Formulation

DuPont™ Styrofoam™ Brand Panel Core 20 Extruded Polystyrene (XPS) Insulation is a closed-cell high-performance core material. DuPont’s proprietary extrusion process enables precise control of parameters such as density, cell size and cell orientation. This yields foam boards that can meet the most demanding composite panel applications. Styrofoam™ Brand Panel Core 20 is supplied in sheets that have been carefully engineered and planed to precise tolerances for a superior bonding surface.

Styrofoam™ Brand Panel Core 20 XPS Insulation extruded polystyrene foam is used extensively in composite panel applications. The closed cell structure of Styrofoam™ Brand Panel Core 20 prevents the foam from absorbing water, which helps maintain panel integrity and insulating properties in low-temperature applications and other environments with high humidity and moisture conditions. The foam is a laminiation grade product.

Specifications

Testing

Styrofoam^™ Brand Panel Core 20 XPS Insulation 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 Characteristics	Flame Spread ≤ 25 Smoke Developed ≤ 450
THERMAL
ASTM C518	Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus	Thermal Resistance per inch: fresh @ 55 °F (13° C) min. fresh @ 20 °F (-7 °C) min.¹	5.0 ft²•h•°F/Btu, R-value, min. 8.0 ft²•h•°F/Btu, R-value, min.
ASTM D696	Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics Between −30°C and + 30°C with a Vitreous Silica Dilatometer	Coefficient of Linear Thermal Expansion	3.5 x 10-5 in/in•°F
ASTM D2126	Standard Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging	Change in Dimensions	2.0% change, max.
STRENGTH
ASTM D1621	Standard Test Method for Compressive Properties of Rigid Cellular Plastics	Compressive Strength²	20 psi, min.
ASTM C203	Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation	Flexural Strength	40 psi, min., extruded
ASTM C203	Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation	Flexural Modulus	1,600 psi, min., extruded
ASTM D1623	Standard Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics	Tensile Strength	50 psi, min., vertical
ASTM C273	Standard Test Method for Shear Properties of Sandwich Core Materials	Shear Strength	25 psi, min.
ASTM C273	Standard Test Method for Shear Properties of Sandwich Core Materials	Shear Modulus	300 psi, min.
WATER
ASTM C272	Standard Test Method for Water Absorption of Core Materials for Sandwich Construction	Water Absorption	0.1% by volume, max.
ASTM E96	Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials	Water Vapor Permeance³	1.5 perm, max.

¹R means resistance to heat flow. The higher the R-value, the greater the insulating power.

²Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first. Since Styrofoam^™ Brand Extruded Polystyrene Foam Insulations are visco-elastic materials, adequate design safety factors should be used to prevent long-term creep and fatigue deformation.

³Based on 1” thickness.

Code Compliance

Styrofoam^™ Brand Panel Core 20 XPS Insulation complies with the following codes:

Code	Description
US Product Listings & Verifications	International Residential Code (IRC) and International Building Code (IBC); see ICC-ES ESR-4755 Underwriters Laboratories, Inc. (UL) Classified, see Classification Certificate D-369
Regional Code Listings & Reports	California Std. Reg. #CA T1535