DuPont™ Styrofoam™ Brand ST-100 Series XPS Insulation is compliant in HFC-regulated U.S. states.

Our color is changing.
Our standard is not.


Beyond Blue

NEW Styrofoam™ Brand ST-100 Series XPS

The ST-100 Series low GWP formulation represents a sustainable technology shift that reduces the product's embodied carbon, meets U.S. state HFC regulations and supports DuPont's 2030 Sustainability Goals. This game-changing formulation is a new grey color instead of the traditional blue — so you’ll know it when you see it.

The newest members of the pack

Introducing DuPont™ Styrofoam™ ST-100 Series XPS Insulation
The Styrofoam™ Brand ST-100 Series has been formulated to meet sustainability goals for climate action regulations in U.S. states. But some things remain unchanged: these new XPS products offer the same high performance and long-term value under the same Styrofoam™ product names with ST-100 descriptor – so there’s no need to change your specifications.

For additional details on compliance, refer to our U.S. compliance map and ICC-ESR 4755 code report.

View the compliance map →


For a complete list of current Styrofoam™ Brand ST-100 product lines with IRC and IBC building code application approvals, refer to ICC-ESR 4755.

On Top With Next-Generation Styrofoam™ Brand XPS

Read about our very own re-roof project premiering low GWP Styrofoam™ Brand XPS Insulation for an improved sustainability profile

Learn more

Published EPDs and Embodied Carbon

DuPont’s Styrofoam™ Brand Insulation GWP Phase-Down program offers lower embodied carbon product solutions compliant with specific US HFC and GWP Regulations without compromising on performance.
Remember: Embodied carbon should only be reported by manufacturers using third-party verified EPDs, and comparison of EPDs should be interpreted with caution due to complexity in modeling product life cycles and the lack of quantified uncertainty in reported values. Many factors, including embodied carbon and other sustainability considerations, should be used to guide product decisions.

Published Environmental Product Declarations (EPDs) for selected XPS products available in regulated U.S. states

Styrofoam™ Brand
Owens Corning
Foamular® NGX™
GreenGuard® LG
EPD Available? Yes Yes Yes
Embodied carbon
(A1-C4) kgCO2e/m2RSI
6.2 9.8 4.5
Embodied carbon
(A1-C4) kgCO2e/bdft*
0.5 0.8 0.4
LEED Optimization Credit Eligible? Yes, 2
(max possible+)
Yes, 1.5
(max possible)


Note+: DuPont can offer customers the maximum two product valuation towards the Option 2, 1-point Embodied Carbon/.LCA Optimization credit.
DuPont™  Styrofoam™ Brand XPS also qualifies as 1 product towards the Option 1, 1-point.


*To convert kgCO2e/m2RSI to kgCO2e/bdft, divide by 12.24. The 12.24 factor was calculated by the following equations:
1m2RSI = 1m2 * 1.14 inch = 1.02 ft3 (where 1m2 = 10.76 ft2 and 1.14 in = 0.095 ft)
1bdft = 1ft2*in = 1ft2*(1/12 ft) = 0.0833 ft3
1.02/0.0833 = 12.24 m2RSI / bdft


We're here to help

Let’s talk about what Styrofoam™ Brand ST-100 Series XPS can do for your next project.

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Meeting or exceeding
code regulations

  • Meets ASTM C578 Types (see product information) 
  • Compliant with IRC, IBC and IECC codes as listed in ICC-ESR 4755
  • Contributes to USGBC LEED V4 points in multiple categories, including EA Credit 1 for Optimized Energy Performance (1-19 points), MRc3 Sourcing of Raw Materials, MRc4 - Material Ingredients, and EQc2, Low Emitting Materials

A strong
sustainability profile

  • Low global warming potential (GWP)
  • Produced using 100% Renewable Electricity
  • UL Environment Certified recycled content (20% average)
  • Low VOC compliance (California Title 24 standard)
  • Contributes to DuPont's 2030 GHG emissions reduction goal
  • Manufactured with BluEdge™ polymeric FR sustainable technology

Building for
the future

  • Styrofoam™ Brand ST-100 Series XPS continues the legacy of Styrofoam™ Brand XPS, which has been installed in millions of buildings worldwide, saving billions in energy costs annually
  • Zero-ozone depletion formula
  • Enabling a Circular Economy with reuse
  • Helps achieve high performance, durable buildings for thriving communities

A path to positive change

Styrofoam™ Brand ST-100 Series is compliant in HFC regulated U.S. states

We know that sustainability is more than just how our products are produced. It’s also about how they perform. Without compromising on quality, durability or thermal performance, we are introducing a new Styrofoam™ ST-100 Series XPS formulation that reduces greenhouse gas emissions and helps meet the DuPont 2030 Sustainability Goals. We’re delivering a product that has been evaluated by third-party certifications to meet or exceed standards on both sustainability and performance.

Move forward with grey Styrofoam™ Brand XPS

GWP reduction

GWP Reduction

Our history is rooted in innovation and Styrofoam™ Brand XPS is the industry leader – allowing us to deliver better, more-sustainable technology for modern building needs. The low GWP Styrofoam™ Brand XPS is another example of our long-term commitment to global sustainability and environmentally compliant building solutions.


The Styrofoam™ Brand ST-100 series, under the same product names you know, will be available for all the existing Styrofoam™ product lines: for example, Styrofoam™ Square Edge is available as Styrofoam™ Square Edge ST-100 XPS insulation. The change is easy to identify; we are modifying the color from the traditional blue to the new grey.


Above and beyond ensuring environmental compliance, we're continuing to advance our 2030 Sustainability Goals and invest in global efforts and technology innovations to help you design and build energy-efficient, resilient and durable structures in this rapidly changing world.


New color.
Same value.

When you’re protecting all six sides of the building envelope, the Styrofoam™ Brand product family has long been the choice for quality, consistent performance and energy efficiency. The new Styrofoam™ Brand ST-100 Series XPS formulation maintains the high levels of performance you’ve come to expect from the Styrofoam™ Brand.

Performance is not a color

Shield Therm

Styrofoam™ Brand ST-100 Series XPS delivers the same R-value – R-5 per inch thickness – for long-term thermal performance. The grey color lets you know it was made more sustainably – with reduced embodied carbon – thanks to an innovative low global warming potential (GWP) formulation.

Rain Sun

With the same thermal performance, moisture resistance, durability and ease of use, Styrofoam™ Brand ST-100 Series XPS Insulation – along with our complete building envelope solutions – delivers protection that’s a sure fit for all six sides.


Styrofoam™ Brand ST-100 Series products are compliant in HFC regulated U.S. states. Refer to the Styrofoam™ Brand XPS Code Report ICC-ESR 4755 for details.


Styrofoam™ Brand ST-100 Series XPS Resources

Watch the Safe Jobsite Handling Video

Safe Jobsite Handling Video

United States


Product Information Sheets

Find →

Styrofoam™ Brand Product Brochure

Download PDF ↓

Styrofoam™ Brand ST-100 Series XPS EPD

Download PDF ↓

Physical Property Equivalency Letter

Download PDF ↓


Example Safety Data Sheet

Download PDF ↓

Customer Processing and Transport Safe Handling

Download PDF ↓

Fact Sheet

Download PDF ↓

Safe Processing & Handling Graphic

Download PDF ↓


Solar Exposure Technical Bulletin

ST-100 – US (English) PDF ↓

Solar Exposure Technical Bulletin

Styrofoam(TM) Brand XPS LEED Optimization Document- Embodied Carbon Assessment

Download PDF ↓


Traditional Blue Styrofoam™ Brand

Visit ➞  

Solar Exposure Technical Bulletin

See the difference

New Styrofoam™ Brand ST-100 Series XPS – Product Differentiation

 New grey color    ST-100 nomenclature    Compliance information 
Comparison of current blue Styrofoam™ Brand XPS with new grey board.

Any questions?

The Styrofoam™ Brand was the original, creating the product segment. Rooted in innovation, we’re excited to deliver a more-sustainable solution. Let’s start a conversion and discuss your next project.


1 DuPont Styrofoam™ ST-100 EPD UL Declaration #: 4789868895.101.1. See also DuPont Styrofoam™ (blue) EPD UL Declaration #: 4789559274.101.1 for non-regulated states.
2 Owens Corning NGX EPD Declaration # 4789639125.101.1
3 Kingspan Low GWP EPD referenced: Declaration #SCS-EPD-07176 (40 psi). Other Kingspan published EPDs: SCS-EPD-07175 (25 psi); SCS-EPD-07177 (60 psi)
4 We have purchased Renewable Energy Credits to offset our electricity usage since 2016.
5 Styrofoam™ Brand Cavitymate™ Ultra Insulation, with patented carbon black technology, will continue to be produced in dark grey, delivering long-term insulating performance of R-5.6 per inch in wet cavity wall environments.
6 R means resistance to heat flow. The higher the R-value, the greater the insulating power
7 Lower embodied carbon as demonstrated by DuPont Environmental Product Declarations (EPDs)


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