Engineered for both concealed and exposed applications, DuPont™ Thermax™ Sheathing is an easy-to-use nonstructural rigid insulation board with a fiberglass-infused foam core that helps improve fire performance and dimensional stability.
DuPont™ Thermax™ Sheathing is a multipurpose, nonstructural, rigid board insulation that is quick and easy to install in a wide range of exposed and concealed cavity wall applications. It consists of a glass-fiber-infused polyisocyanurate foam core laminated between 1.0-mil smooth, reflective aluminum facers on both sides. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. DuPont™ Thermax™ Brand insulation delivers wall performance you can count on. It’s ready to meet your toughest building challenges – both outside and inside the wall – with a robust ISO insulation product line and an R-value that’s proven consistent over time and a range of temperatures.
|Easy to cut, handle, and install||
|Compressive Strength<sup>1</sup>||ASTM D1621||Psi, min (kPa)||25 (170)|
|Water Absorption<sup></sup>||ASTM D2842||-||3.5|
|ASTM C209||% by volume, max.||0.1|
|Water Vapor Permeance<sup></sup>||ASTM E96||perm, max (ng/Pa-s-m2)||<0.03 (<15)|
|Maximum Use Temperature<sup></sup>||-||°F||250|
|Flexural Strength<sup></sup>||ASTM C203||Psi, min (kPa)||40 (275)|
|Tensile Strength<sup></sup>||ASTM D1623||Psi, min (kPa)||24 (170)|
|Dimensional Stability<sup></sup>||ASTM D2126||%||0.2|