Closed Cell Spray Foam Insulation
Rigid, high-performance foam that insulates, air seals and isn't water permeable, for residential, commercial and industrial work.
Rigid Spray Foam
Rigid insulation with a high R-value per millimetre
Products Product: Closed Cell
Closed cell foam cures into a hard, rigid layer. Its sealed cells give it a higher R-value per millimetre than open cell foam, and it isn't water permeable.
That makes it a strong choice for underfloors, metal roofs, sheds, shallow framing and moisture-prone areas.
Why choose this solution
Thermal comfort
Sprayed directly to the substrate for continuous insulation, helping keep temperatures stable.
Condensation control
Closed cell foam isn't water permeable, which helps manage moisture and condensation.
Air sealing
The foam expands into cracks and joins as it's applied, reducing air leakage through the building.
Long-lasting performance
Foam adheres to the surface and won't sag or settle the way loose insulation can.
Performance varies with the product, thickness, building and installation. Fire performance is product specific: see our fire performance page.
More about closed cell spray foam insulation

Australia's Premium Closed-Cell Spray Foam Insulation Solution
HEATLOK® ECO™ is an innovative solution for continuous insulation needs. Designed for optimal energy efficiency and environmental sustainability, it incorporates cutting-edge technologies that redefine spray foam insulation standards.
HEATLOK® ECO™ combines the proven strengths of Heatlok with 4th-generation blowing agent technology, ensuring superior performance and unmatched eco-friendliness.
Premium Closed Cell Spray Foam Insulation
Fully compliant with the Montreal Protocol, promoting sustainable building practices.
Superior adhesion, compressive strength, and yield ensure long-lasting results.
Made using Huntsman’s latest polyester polyols technology, incorporating recycled waste PET bottles.
Utilises Honeywell’s Solstice® Liquid Blowing Agent technology with an ultra-low Global Warming Potential (GWP) of 1, 99.9% lower than traditional agents.

Closed-cell polyurethane foam made with recycled materials.
Insulation Applications and Solutions
What is closed-cell spray foam insulation?
- A type of foam insulation that consists of cells that are completely sealed and packed closely together. This structure gives the material its unique properties, making it an effective solution for insulation in residential, commercial, and industrial buildings.
How much does spray foam insulation cost?
- Costs vary based on the area and application. Contact us today for a tailored quote on spray foam insulation in Australia.
Is HEATLOK® ECO™ compliant with Australian building codes and environmental regulations?
- Yes, it complies with Australian building codes and environmental regulations. It aligns with the principles of the Montreal Protocol and meets the nation’s sustainability standards, ensuring it delivers high performance while supporting eco-friendly construction practices.

When it comes to insulation, Heatlok® ECO™ offers unmatched performance, eco-friendly innovation, and reliability. Invest in sustainable building solutions with the trusted power of Heatlok.
Related services
Servicing Projects Across WA, VIC, QLD & NSW
Our spray foam crews operate locally from Perth Metro, Melbourne, Brisbane and Sydney.
Perth & WA Regions
Areas we cover
- Perth Metro Area (North & South of River)
- Joondalup, Wanneroo, Stirling & Coastal Suburbs
- Fremantle, Melville, Rockingham & Mandurah
- Hills Region, Midland, Kalamunda & Swan Valley
- Bunbury & South West Regional WA
Same-day on-site assessments available across Perth metro
Melbourne & VIC Regions
Areas we cover
- Greater Melbourne & Inner City Ring
- Northern Suburbs (Preston, Brunswick, Whittlesea)
- Eastern & South Eastern Suburbs (Bayside, Monash)
- Western Suburbs (Werribee, Sunshine, Point Cook)
- Geelong, Mornington Peninsula & Yarra Ranges
24-hour response for Melbourne & Regional VIC enquiries
Brisbane & QLD Regions
Areas we cover
- Greater Brisbane & Inner City Suburbs
- Moreton Bay, Logan City & Redland Coast
- Gold Coast & Sunshine Coast Regions
- Ipswich, Toowoomba & Regional QLD
Rapid dispatch across Greater Brisbane & South East Queensland
Sydney & NSW Regions
Areas we cover
- Greater Sydney & Western Sydney Hubs
- South West Sydney, Liverpool & Campbelltown
- North Shore, Northern Beaches & Hills District
- Wollongong, Central Coast & Regional NSW
Dedicated local crew serving Sydney Metro & Regional NSW
Located outside major metro zones?
We work on rural, coastal, agricultural and remote mining projects. Tell us about the site and we'll assess what's needed to get a crew there.
Frequently Asked Spray Foam Questions
What you need to know about foam types, R-values, where spray foam can go, safety and fire performance.
Our team can talk through your substrate, access, climate and the data sheets you need.
Ask Our Technical TeamWhat is the difference between closed cell and open cell spray foam?
What R-value can spray foam achieve?
Where can spray foam insulation be used?
Is spray foam safe once it has cured?
Is spray foam insulation fire rated?
Can I spray foam my property myself?
Can you paint spray foam insulation?
How much does spray foam insulation cost?
Ready for a seamless experience?
Our spray foam consultants assess your property and recommend a practical, cost-effective solution for comfort and energy performance.
Call us
1300 614 134Email us
info@sprayfoamaustralia.com.auGet your free quote
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