SKU: 59158305102

Atlas ACFoam-III Grade-III Polyiso CGF Roof Insulation, 1-1/2 in x 4 ft x 8 ft (25 psi)

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Ships within 48 hours Β· Estimated delivery Aug 10 - Aug 15

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Description

Atlas ACFoam-III Grade-III Polyiso CGF Roof Insulation, 1-1/2 in x 4 ft x 8 ft (25 psi)ACFoam III 1 1 2" Polyiso Roof Insulation Board Closed cell polyisocyanurate roof insulation with fiber reinforced organic felt facers for durable thermal performance. The Grade III board delivers 25 psi compressive strength and long term thermal resistance in a 1 1 2 in thick, 4x8 format. Key Features: Durable Polyiso Core: Closed cell foam for strong thermal resistance (LTTR) Reinforced Facers: Non asphaltic, fiber reinforced organic felt facers

ACFoam-III 1-1/2" Polyiso Roof Insulation Board

Closed-cell polyisocyanurate roof insulation with fiber-reinforced organic felt facers for durable thermal performance. The Grade-III board delivers 25 psi compressive strength and long-term thermal resistance in a 1-1/2 in thick, 4x8 format.


Key Features:

  • Durable Polyiso Core: Closed-cell foam for strong thermal resistance (LTTR)
  • Reinforced Facers: Non-asphaltic, fiber-reinforced organic felt facers improve stability
  • Grade-III Strength: 25 psi compressive strength supports rooftop applications
  • Standard Panel Size: 1-1/2 in thickness, 4 ft x 8 ft board for efficient coverage
  • Broad Approvals: Meets ASTM C1289 and multiple UL/FM, Miami-Dade, and Florida product approvals

Specifications Table:

Specification Details
Thickness 1-1/2" (38.1 mm)
Length 8' (2440 mm)
Width 4' (1220 mm)
Compressive Strength 25 psi (Grade-III)
Core Closed-cell polyisocyanurate foam
Facers Non-asphaltic, fiber-reinforced organic felt, integrally bonded
Style Polyiso
Unit of Measure SQ|PC
Applicable Standards/Approvals ASTM C1289; CAN/ULC-S704; CCMC No. 12423-L; UL Certified for Canada; UL 1256; UL 790 (ASTM E108); UL 263 (ASTM E119); UL 1897; FM 4450/4470; IBC Chapter 26 & NBC; California State; Miami-Dade County Approved; Florida Product Approved; Greenguard Certified; RCI Approved; NRCA Approved; AIA Approved; U.S. Green Building Council Member
Area Coverage 1024 sq. ft. per unit
Item Weight 13 lb
Product Number ATLAC3251548

Frequently Asked Questions (FAQ):

Q: What is the board size and thickness?
A: Each panel is 4 ft x 8 ft and 1-1/2 in thick.


Q: What is the compressive strength?
A: Grade-III provides 25 psi compressive strength.


Q: What type of facers does it use?
A: Non-asphaltic, fiber-reinforced organic felt facers integrally bonded to the polyiso core.


Q: What standards and approvals does it meet?
A: ASTM C1289, CAN/ULC-S704, UL 1256/790/263/1897, FM 4450/4470, Miami-Dade and Florida approvals, among others.


Q: Where is this insulation typically used?
A: As roof insulation in commercial or residential low-slope roofing systems requiring high thermal performance and strength.


Sleek Strength for Elevated Roofscapes

This streamlined board brings a quiet confidence to the envelope, marrying crisp geometry with robust performance. The fiber-reinforced facer lends a tailored finish while the polyiso core delivers enduring warmth. Layer it to sculpt clean, modern rooflines and maintain a refined silhouette. A discerning essential for luxurious, high-performing architecture.


Choose ACFoam-III to upgrade your roof’s efficiency and strength with proven, approved performance.

Warranty

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 59158305102

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4.3 β˜…β˜…β˜…β˜…β˜…
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A
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Amazon Customer
Chelsea, US
β˜…β˜…β˜…β˜…β˜… 2
Buy the individual cross cut sheets, not these rolls.
Size: 36 sqft
I ordered two different types, individually cross cut foil rectangular pieces and these rolls both containing 36. sq. ft. The cross cut sheet blows this away. This stuff is much thinner, much less butyl rubber, much flimsier foil, and needs twice as much to have the same effect. Once you put it on, you cant remove it. The other brand's 2mm is much thicker than this.
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Reviewed in the United States on June 3, 2026
V
Verified Purchase
VanillaPepper
Cuba, US
β˜…β˜…β˜…β˜…β˜… 5
Cheap Insurance Against Headliner Failure
Size: 4-pack
Cheap Insurance Against Headliner Failure If you’ve ever owned a Jeep with a hardtop, you already know that heat, cold, humidity, and constant temperature swings can be tough on adhesives over time. Even when replacement headliner kits include their own adhesive, I still like having a high-quality automotive adhesive on hand for extra peace of mind. This 3M product has been one of my go-to choices for headliner work because it is specifically designed for automotive environments where materials are exposed to extreme summer heat and winter cold. The last thing anyone wants is to spend time installing a headliner only to have corners start sagging or sections pull away months later. The spray pattern is consistent, the adhesion is strong, and it provides the confidence that the installation will hold up long-term. I have found it especially useful for Jeep hardtops, where temperature fluctuations can be much more extreme than in a traditional vehicle. The cans arrived well packaged, and having multiple cans on hand is convenient for larger projects or future repairs. For Jeep owners, restorations, headliner repairs, upholstery projects, or anyone wanting a little extra insurance against adhesive failure, this is a product I would not hesitate to keep in the garage. #FoundItOnAmazon #JeepLife #JeepJKU #HeadlinerRepair #3M #AutomotiveProjects #GarageEssentials #DIYGarage #AmazonFinds #JeepMods #AutomotiveMaintenance
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Reviewed in the United States on May 30, 2026
M
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M. Corselli
Houston, US
β˜…β˜…β˜…β˜…β˜… 5
Good n sticky
Size: 4-pack, Size: 4-pack
Used almost four cans for install of convertible top on Super Beetle.
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Reviewed in the United States on May 2, 2026
J
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joseph
Whiting, US
β˜…β˜…β˜…β˜…β˜… 5
Easy to Use and Professional Results
This adhesive saved me a trip to the upholstery shop. It bonded my fabric headliner back in place with a solid, even hold. No overspray issues, and it dries quickly. Looks like it was professionally done. Two cans were more than enough for the job.
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Reviewed in the United States on April 16, 2025
O
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Old school
Massapequa, US
β˜…β˜…β˜…β˜…β˜… 5
Worked well on my headliner
Size: 2-pack
Very strong fabric glue
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Reviewed in the United States on December 19, 2025

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