What R-value does ThermoSeal spray foam provide?

ThermoSeal 500 provides R-4.1 per inch. ThermoSeal 800 provides R-4.5 per inch. ThermoSeal HFO provides R-7.4 per inch (R-25 at 3.5 inches). ThermoSeal 5G provides R-7.3 per inch (R-25 at 3.5 inches). All values tested per ASTM C 518.

Open Cell & Closed Cell SPF

Spray Foam Products Built for Performance

Q: What is the difference between ThermoSeal open cell and closed cell spray foam?

ThermoSeal open cell products (500 and 800) are lighter density (0.5–0.75 lb/ft³), water blown, and provide R-4.1 to R-4.5 per inch. They excel at air sealing, sound dampening (NRC up to 0.75), and are ideal for interior walls and attics. ThermoSeal closed cell products (HFO and 5G) are medium density (2.0 lb/ft³), HFO blown with a GWP of 1, and provide R-7.3 to R-7.4 per inch. They add vapor barrier properties, structural racking strength, and moisture protection.

Q: What blowing agent does ThermoSeal use?

ThermoSeal 500 and 800 (open cell) are totally water blown with a global warming potential (GWP) of 1, the lowest in the industry. ThermoSeal HFO and 5G (closed cell) use Forane 1233zd LBA, a next-generation HFO blowing agent with a GWP of 1, which is 99.9% lower than traditional HFC blowing agents. All products contain ZERO ozone depleting substances.

Q: Are ThermoSeal products IAPMO certified?

Yes. ThermoSeal 500 and 800 hold IAPMO Evaluation Report ER-0603. ThermoSeal HFO and 5G hold IAPMO Evaluation Report ER-0698. All products are Class 1 rated per ASTM E 84 and meet or exceed ASTM C 1029 Type II requirements.

Q: Which ThermoSeal product is best for commercial buildings?

ThermoSeal 5G is specifically designed for commercial and industrial applications. It is NFPA 285 compliant for commercial wall assemblies with brick, metal, or aluminum cladding on Type I, II, III, and IV buildings of any height (per 2015, 2018, and 2021 IBC). ThermoSeal HFO is also suitable for commercial applications and is approved for fortified roofs with wind uplift ratings up to 286 mph.

ThermoSeal manufactures high-performance open cell and closed cell spray foam insulation using next-generation HFO blowing agents with a Global Warming Potential of just 1, 99.9% lower than traditional HFC foams.

IAPMO Certified GWP of 1 Class 1 Fire Rated Zero ODP

Find a Certified Installer → Download Tech Sheets

Open Cell

Open Cell Spray Foam

ThermoSeal 500

Light Density · 0.5 lb/ft³ · Water Blown · GWP 1

A two-component, semi-rigid, totally water-blown open cell polyurethane foam insulation system. Expands approximately 100 times its initial mass and cures within seconds. Fills all building cavities completely, sealing cracks, crevices, and voids where air loss is most common. The lowest GWP of all spray foam products in the industry.

100x Expansion NRC 0.75 Air Impermeable Zero ODP Class 1 Fire

Physical Properties (ASTM Tested)
R-Value	4.1 @ 1"	ASTM C 518
Core Density	0.5 lb/ft³	ASTM D 1622
Open Cell Content	> 97%	ASTM D 6226
Air Permeance	<0.02 L/sm² @ 75 Pa / 3.5"	ASTM E 283 & E 2178
Sound Transmission Coeff.	39	ASTM E 413
Noise Reduction Coeff.	0.75	ASTM C 423
Tensile Strength	5.19 PSI	ASTM D 1623
Dimensional Stability	< 5%	ASTM D 2126
Evaluation Report	IAPMO ER-0603	IAPMO ES

View Full Specs → Download TDS Get a Quote

Open Cell

Open Cell Spray Foam

ThermoSeal 800

Light Density · 0.75 lb/ft³ · Water Blown

A two-component, semi-rigid, totally water-blown 0.75 lb open cell polyurethane foam system. Expands approximately 75 times its initial mass and cures within seconds. The higher density provides an enhanced air barrier and superior sound control performance. Contains ZERO ozone depleting blowing agents, catalysts, polyols, or fire retarding materials.

R-4.5/inch 75x Expansion Enhanced Density Air Impermeable Class 1 Fire

Physical Properties (ASTM Tested)
R-Value	4.5 @ 1"	ASTM C 518
Core Density	0.75 lb/ft³	ASTM D 1622
Open Cell Content	> 75%	ASTM D 6226
Air Permeance	<0.02 L/sm² @ 75 Pa / 3.5"	ASTM E 283 & E 2178
Sound Transmission Coeff.	38	ASTM E 413
Noise Reduction Coeff.	0.65	ASTM C 423
Tensile Strength	5.7 PSI	ASTM D 1623
Dimensional Stability	< 3.15%	ASTM D 2126
Evaluation Report	IAPMO ER-0603	IAPMO ES

View Full Specs → Download TDS Get a Quote

Closed Cell

Closed Cell Spray Foam

ThermoSeal HFO

Medium Density · 2.0 lb/ft³ · HFO Blown (Forane 1233zd) · GWP 1

A next-generation, HFO-based two-component, semi-rigid, medium density closed cell polyurethane foam system. Uses Forane 1233zd LBA blowing agent with a GWP of 1, 99.9% lower than HFC blowing agents. Simultaneously insulates and air-seals your building structure. No ignition barrier required in attics and crawlspaces. Wind uplift rated to 286 mph and approved for fortified roofs.

R-7.4/inch Vapor Barrier No Ignition Barrier 286 MPH Wind Uplift Fortified Roof Approved

Physical Properties (ASTM Tested)
R-Value	7.4 @ 1" / 25 @ 3.5"	ASTM C 518
Core Density	1.9 – 2.1 lb/ft³	ASTM D 1622
Closed Cell Content	≥ 92%	ASTM D 2856
Air Permeance	<0.02 L/sm² @ 75 Pa / 2.0"	ASTM E 283 & E 2178
Water Vapor Permeance	0.86 Perms @ 1.37"	ASTM E 96
Compressive Strength	27.43 PSI	ASTM D 1621
Tensile Strength	48.64 PSI	ASTM D 1623
Wind Uplift	PASS @ 210 psf / 286 mph	UL 1897
Fortified Roofs	PASS @ 171.6 psf	ASTM E 330
Evaluation Report	ER-0698	IAPMO ES

View Full Specs → Download TDS Get a Quote

Closed Cell

Closed Cell Spray Foam · Commercial & Industrial

ThermoSeal 5G

Medium Density · 2.0 lb/ft³ · HFO Blown (Forane 1233zd) · GWP 1

A next-generation HFO-based closed cell system designed specifically for commercial and industrial buildings. NFPA 285 compliant for commercial wall assemblies with brick, metal, or aluminum cladding on Type I, II, III, and IV buildings of any height per 2015, 2018, and 2021 IBC. Contains ZERO ozone depleting catalysts, polyols, or fire retarding materials.

R-7.3/inch NFPA 285 Compliant Vapor Barrier No Ignition Barrier Commercial Grade

Physical Properties (ASTM Tested)
R-Value	7.3 @ 1" / 25 @ 3.5"	ASTM C 518
Core Density	1.9 – 2.1 lb/ft³	ASTM D 1622
Closed Cell Content	≥ 92%	ASTM D 2856
Air Permeance	<0.02 L/sm² @ 75 Pa / 2.0"	ASTM E 283 & E 2178
Water Vapor Permeance	0.86 Perms @ 1.37"	ASTM E 96
Compressive Strength	29.5 PSI	ASTM D 1621
Tensile Strength	56.8 PSI	ASTM D 1623
Commercial Wall Assemblies	PASS: IAPMO ER-0968	NFPA 285
Evaluation Report	ER-0698	IAPMO ES

View Full Specs → Download TDS Get a Quote

Product Comparison

ThermoSeal Products at a Glance

All four products compared side by side, plus fiberglass and cellulose for reference.

Property	500	800	HFO	5G	Fiberglass	Cellulose
Type	Open Cell	Open Cell	Closed Cell	Closed Cell	Batt	Blown-In
R-Value / Inch	4.1	4.5	7.4	7.3	3.1–3.4	3.2–3.8
Core Density	0.5 lb	0.75 lb	2.0 lb	2.0 lb	—	—
Air Barrier	✓	✓	✓	✓	✕	✕
Vapor Barrier	—	—	✓	✓	✕	✕
Sound Control	NRC 0.75	NRC 0.65	—	—	Moderate	Good
Structural	—	—	✓	✓	✕	✕
Blowing Agent	Water	Water	HFO	HFO	—	—
GWP	1	—	1	1	—	—
IAPMO Report	ER-0603	ER-0603	ER-0698	ER-0698	—	—
Best For	Residential	Sound Control	Residential & Roofing	Commercial	Budget	Retrofit

Applications Guide

Which Product Is Right for Your Project?

Every building is different. Here's a quick guide to matching the right ThermoSeal product to your application.

Residential Walls & Attics

Interior walls, attics, and ceilings where air sealing, sound control, and affordability are top priorities.

→ ThermoSeal 500 or 800

Basements & Crawl Spaces

Moisture-prone areas that need vapor barrier protection, structural reinforcement, and maximum R-value per inch.

→ ThermoSeal HFO

Commercial Buildings

Office buildings, schools, retail, and warehouses requiring NFPA 285 compliant wall assemblies and code compliance.

→ ThermoSeal 5G

Roofing Systems

SPF roofing applications requiring wind uplift resistance up to 286 mph and fortified roof approval.

→ ThermoSeal HFO

Sound Control

Studios, multi-family housing, home theaters, and any space where noise reduction is critical.

→ ThermoSeal 500 (NRC 0.75)

New Construction

Frame walls, roof decks, and rim joists. Pair open cell for interior partitions with closed cell on exterior-facing assemblies.

→ 500/800 interior + HFO/5G exterior

Product FAQ

Product Questions & Answers

Technical answers for homeowners, builders, architects, and installers.

What is the difference between ThermoSeal open cell and closed cell spray foam?

ThermoSeal open cell products (500 and 800) are lighter density (0.5–0.75 lb/ft³), totally water blown, and provide R-4.1 to R-4.5 per inch. They excel at air sealing and sound dampening (NRC up to 0.75). ThermoSeal closed cell products (HFO and 5G) are medium density (2.0 lb/ft³), HFO blown with Forane 1233zd (GWP of 1), and provide R-7.3 to R-7.4 per inch. They add vapor barrier properties, structural strength, and moisture protection.

What blowing agent does ThermoSeal use?

ThermoSeal 500 and 800 are totally water blown with a Global Warming Potential of 1, the lowest in the industry. ThermoSeal HFO and 5G use Forane 1233zd LBA, a next-generation HFO blowing agent with a GWP of 1, which is 99.9% lower than traditional HFC blowing agents. All ThermoSeal products contain ZERO ozone depleting substances.

Which product should I use for commercial buildings?

ThermoSeal 5G is specifically designed for commercial and industrial applications. It is NFPA 285 compliant for commercial wall assemblies with brick, metal, or aluminum cladding on Type I, II, III, and IV buildings of any height per 2015, 2018, and 2021 IBC. For commercial roofing, ThermoSeal HFO is approved for fortified roofs with wind uplift ratings up to 286 mph (UL 1897).

Are ThermoSeal products IAPMO certified?

Yes. ThermoSeal 500 and 800 hold IAPMO Evaluation Report ER-0603. ThermoSeal HFO and 5G hold IAPMO Evaluation Report ER-0698. All products achieve Class 1 fire rating per ASTM E 84, meet ICC-ES AC377 Appendix X for ignition barrier exemption, pass NFPA 286 thermal barrier testing, and meet or exceed ASTM C 1029 Type II requirements.

What processing temperatures and pressures are required?

ThermoSeal 500 and 800 (open cell): Primary heater and hose target 129°F, processing pressure 1,200 PSI, 1:1 mixing ratio by volume. ThermoSeal HFO and 5G (closed cell): Primary heater and hose target 110–120°F, processing pressure 1,200–1,450 PSI, 1:1 mixing ratio by volume. All products require substrates 10°F above dew point and free of debris. Refer to the Technical Data Sheet for complete processing parameters.

Spray Foam Products Built for Performance

ThermoSeal 500

ThermoSeal 800

ThermoSeal HFO

ThermoSeal 5G

ThermoSeal Products at a Glance

Which Product Is Right for Your Project?

Residential Walls & Attics

Basements & Crawl Spaces

Commercial Buildings

Roofing Systems

Sound Control

New Construction

Product Questions & Answers

Talk to a ThermoSealProduct Specialist

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