Designed for immediate insulation and weather protection on the job site, as well as long-term thermal performance, DuPont™ Thermax™ (ci) Exterior Insulation is a rigid foam board insulation with a glass-fiber-reinforced polyisocyanurate foam core that helps improve fire performance and dimensional stability. A nominal 1.25-mil embossed thermoset-coated aluminum on one side and 0.9-mil smooth, reflective aluminum on the other provide durability and long-term performance. Used in the DuPont™ Thermax™ Wall System, DuPont™ Thermax™ (ci) Exterior Insulation can help you design for the future, while its light weight and ease of installation save time and money on the job site.
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 polyiso insulation product line and an R-Value that’s proven to be consistent over time and a range of temperatures.

Available Sizes
Standard Thermax™ insulation board dimensions are 4'x8'. Custom lengths are available up to 30'. Please contact your local DuPont representative for additional availability details or call our product support team at 1-833-338-7668