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InsulStar

InsulStar is a high-performance 2lb/ft3 density, closed-cell polyurethane spray foam insulation for residential construction applications.as a liquid to residential walls, ceilings, attics or floors. 

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How it WorksInsulStar ResultsDocumentsWhy InsulStar?PropertiesAdvantagesCase Studies

How InsulStar Works

InsulStar® foam insulation is a two-part liquid, formulated from renewable agricultural resources, that is sprayed in place by specially trained GoldStarSM contractors. This liquid quickly expands, filling all gaps and voids, and cures to form a fully adhered, solid, monolithic insulation envelope that is a highly effective air barrier and moisture vapor retarder. InsulStar’s® high R-value allows designers to reduce the depth of exterior walls and still obtain high energy efficiency.

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The Challenge

Builders and homeowners are increasingly aware that without a proper air and moisture barrier, homes are vulnerable to water damage, air leaks, and condensation that can lead to mold growth. This not only threatens the building structure but also increases energy costs and reduces comfort.

The Solution

InsulStar® is a 2lb/ft³ density, closed-cell polyurethane foam insulation that is applied as a liquid to walls, ceilings, attics, and floors. It expands and cures in place, forming a seamless insulating membrane that blocks air, noise, and moisture. The closed-cell structure controls moisture vapor, preventing condensation and mold growth. InsulStar® is also antimicrobial, inhibiting bacteria and fungus growth (ASTM C 1338), though it doesn't protect occupants from external mold or spores.

The End Result

InsulStar® provides superior insulation, improving energy efficiency and reducing heating and cooling costs. By insulating directly to the roof deck, previously unused attic space can become valuable living areas—like bonus rooms or closets—adding market value with minimal cost. It’s a high-performance, low-maintenance solution for a more comfortable, energy-efficient home.

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Find InsulStar Technical Documents

Tech Specs

  • InsulStar Technical Data Sheet
  • InsulStar Safety Data Sheet
  • InsulStar Fact Sheet

Evaluation Reports

  • InsulStar Optimaxx Evaluation Report ER 667
  • InsulStar Optimaxx Evaluation Report ER 340

Certifications

  • InsulStar Optimaxx Clean Air Gold Certificate

Why InsulStar?

Higher R-Value

Provides a higher R-value than conventional insulation, lowering energy bills and reducing energy consumption, thereby lessening your carbon footprint.

Structural Strength

Strengthens walls and increases overall structural integrity by adhering and bonding to the wall surface, so buildings last longer and don’t need to be replaced as often.

Improved Air Quality

Helps block dust and pollutants, and inhibits mold and bacteria growth (per ASTM C1338), contributing to healthier indoor air. 

Resource Conservation

Requires only 2” x 4” studs, reducing lumber use and saving an average of two to three trees per home compared to 2” x 6” studs used with batt insulation. 

Design and Durability

Does not settle, shrink, compress, or sag, maintaining insulation efficiency for the life of the structure. 

Environmentally Friendly

Contains no ozone-depleting chemicals and is recognized by the EPA for contributions to ozone protection.

InsulStar SPF Typical Physical Properties

Description

Closed-cell spray foam polyurethane foam

Free Rise Core Density

ASTM D1622

2 pcf

Closed Cell Content

ASTM D6226

>90%

R-value @ 1”

ASTM C518

7.1

Max Service Temperature

180°F

Air Perm @1/2” & 75 Pa

≤ 0.02 perms

ASTM E2178

Moisture Vapor Perm

ASTM E96 @ 1”

1.3 perms

Compressive Strength

ASTM D1621

28 psi

Tensile Strength

ASTM D1623

45 psi

NFPA 285

Pass

The above values are average values obtained from laboratory experiments and should serve only as guide lines.

Recognized for Sustainability

Energy Star Partner

Montreal Protocol Award Winner

Awarded by United States Enviornmental Protection Agency (EPA)

White House Recognition

SmartSPF line of products for low global warming potential (GWP)

Intertek Sustainability

Certified Clean Air Gold

Member of the US Green Building Council

The Advantages of InsulStar for Residential Insulation

Solutions for Homeowners

  • Significant savings on energy bills with an R-value of 7.1 per inch, reducing heating and cooling costs. 
  • Creates an air barrier that prevents leaks and energy loss. 
  • Functions as a vapor retarder to control moisture. 
  • Improves indoor air quality by blocking dust and pollutants. 
  • Reduces energy consumption and environmental impact. 
  • Reduces outside noise with a seamless, airtight barrier. 
  • Strengthens roof deck attachment against high winds, with Florida product and Miami Dade NOA approval. 
  • Enhances wall strength and structural integrity. 
  • Acts as a secondary water barrier and FEMA Class 5 flood-resistant material. 

Solutions for Designers

  • Adaptable to hard-to-insulate, uniquely shaped designs. 
  • Easy installation to stay under budget and ahead of schedule. 
  • Provides a seamless, fully adhered insulation envelope. 
  • Watertight within seconds of application. 
  • Can be used to convert unused attic space into living areas. 
  • Allows for non-vented crawl space insulation for greater energy savings. 
  • Building code compliant (ESR #1615) and installed by certified GoldStar contractors. 
  • Damp-proofs by forming a seamless membrane between inner and outer walls. 

About Us

NCFI has been manufacturing high-performance spray foam insulation (SPF) products for residential, agricultural, commercial, institutional, and industrial industries since 1967. Our spray foam insulation systems create extremely energy-efficient, comfortable, and safer environments for home and building owners and occupants. At NCFI, we work with you to find the polyurethane solution that works best for your needs and specifications.

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We Have Partnership Down to a Science

We understand the challenges you face, and we’re here to help. Reach out today, and let's work together to find the best solution tailored to your needs with the highest-quality polyurethane foam products available.

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