SKU: 39896880911

Owens Corning FOAMULAR 400 R-10 XPS Foam Board Insulation, 2 in x 4 ft x 8 ft, Square Edge (40 psi)

Sale price$61.66 Regular price$68.51
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Description

Owens Corning FOAMULAR 400 R-10 XPS Foam Board Insulation, 2 in x 4 ft x 8 ft, Square Edge (40 psi)FOAMULAR 400 R 10 XPS Foam Board, 2" x 4' x 8' High performance extruded polystyrene (XPS) insulation board with 40 psi compressive strength for heavy load applications. Offers R 10 thermal resistance at 2 inch thickness and square edges for flush installs. Key Features: High Compressive Strength: 40 psi for under slab, foundation, and commercial roof applications Energy Efficient: R 10 thermal resistance at 2 inch thickness helps reduce heat loss

FOAMULAR 400 R-10 XPS Foam Board, 2" x 4' x 8'

High-performance extruded polystyrene (XPS) insulation board with 40 psi compressive strength for heavy-load applications. Offers R-10 thermal resistance at 2-inch thickness and square edges for flush installs.


Key Features:

  • High Compressive Strength: 40 psi for under-slab, foundation, and commercial roof applications
  • Energy Efficient: R-10 thermal resistance at 2-inch thickness helps reduce heat loss
  • Moisture Resistant: XPS core retains R-value even in wet conditions
  • Easy to Work With: Lightweight panels score, snap, and cut cleanly without special tools
  • Sustainable NGX Formulation: Blowing agent designed to significantly reduce global warming potential

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Insulation Type XPS Rigid Foam Board
Compressive Strength 40 psi (FOAMULAR 400)
R-Value R-10
Thickness 2 in
Width 48 in
Length 8 ft
Coverage Area 32 sq ft per board
Compatible Install Surface Concrete, Plywood, Wood
Faced or Unfaced Unfaced
Insulation Location Exterior sheathing, exterior wall foundation, under slab
Interior/Exterior Exterior (must be covered if used indoors)
Number of Pieces 1
Pack Size 1
Product Weight 10 lb
Warranty Limited Lifetime
Features Formaldehyde-free; Moisture retardant; Mold resistant; Water resistant
Edge Type Square Edge
Material Extruded Polystyrene (XPS)

Frequently Asked Questions (FAQ):

Q: Can this board be used below grade or under slabs?
A: Yes—commonly used for exterior foundation walls and under-slab applications due to its 40 psi compressive strength and moisture resistance.


Q: Does it need to be covered indoors?
A: Yes—XPS foam cannot be left exposed and must be covered by a 15-minute thermal barrier such as drywall when used indoors.


Q: What surfaces is it compatible with?
A: Concrete, wood, and plywood.


Q: Is the board faced or unfaced?
A: Unfaced.


Q: What are the panel dimensions and coverage?
A: Each board is 2 in thick, 48 in wide, and 8 ft long, covering 32 sq ft.


Sculpted Strength, Modern Warmth

This XPS board brings precision and pink-hued confidence to high-performance builds. Its crisp square edge and slim 2-inch profile glide into tight assemblies, delivering steadfast insulation without bulk. Use it to create a clean, continuous thermal layer behind cladding or beneath polished concrete for a seamless envelope. It’s a quiet essential—powerfully functional and undeniably refined.


Upgrade your envelope with FOAMULAR 400 and lock in durable, R-10 energy savings for your next project.

Warranty

Installation

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: 39896880911

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Chelsea, US
★★★★★ 5
Amazing how fast it works
Item Package Quantity: 1
This works so much better than the prescription cream I got from the doctor. I thought 40% was the highest available. Ease of use and it goes exactly where it's needed. Saw improvements after the second day of use.
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Reviewed in the United States on April 4, 2026
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Leigh Anne from Lexington NC
Belleville, US
★★★★★ 5
Amazing cream to restore cracked skin!!
Item Package Quantity: 1
Cracking of my feet is not the problem. This has been the only cream I found that restores my cuticles!! My right thumb constantly stays dry and ugly. The convenience of applying like a ChapStick is wonderful. and allows me to grab and apply frequently. My cuticle has finally become soft and pretty. :) (Highly recommend)
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Reviewed in the United States on December 11, 2025
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Kindle Customer
Dallas, US
★★★★★ 5
Best Foot Cream I’ve Ever Used!
Item Package Quantity: 1
This is honestly the best foot cream I’ve ever used! My feet are incredibly smooth, and my heels look like they’ve never been cracked. I’ve struggled with dry heels before, and this made such a noticeable difference. Highly recommend!
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Reviewed in the United States on May 3, 2026
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Melissa A Zaring
Charlottesville, US
★★★★★ 5
GREAT
Item Package Quantity: 1
Works great!! I have had dry, cracked heals for years because I don't wear shoes around the house. Even my manicurist says my heals look great!
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Reviewed in the United States on May 13, 2026
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Olivia
Bozeman, US
★★★★★ 5
Miracle
Item Package Quantity: 1
I wish I had before and after photos, my feet are in much better shape after using this. I still need to work on them more but I ran out pretty quickly but my feet were dry af. I used to “shave” my feet once a month this is the power of foot filing in a stick. I will never foot file again. I need to find a way to make it last longer but I think I will not need as much now that my feet are in better shape. Iykyk, get this. It’s greasy as all hell but it’s easy to apply and you can do it over a towel and then put socks on immediately before bed. I wish it was a bigger stick but it is not too pricy so it’s worth it.
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Reviewed in the United States on February 17, 2026

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