XPS Insulation

FOAMULAR® XPS Pipe Insulation Fabrication Billets

Specifications and Literature


Technical Information

Physical Properties

PropertyTest Method2Value
Thermal Conductivity, maximum,
180 days @ 75°F mean temperature

0.200 (0.029)
Compressive Strength, minimum, psi (kPa)3,5ASTM D162125 (173)
Water Absorption, maximum, % by volume3,6ASTM C272.15
Water Vapor Permeance maximum, perm (ng/P•s•m2)3,7ASTM E961.1
Dimensional Stability, % linear change3ASTM D21262.0
Flame Spread3,8,9ASTM E8410
Smoke Developed3,8,9ASTM E84175
Service Temperature, maximum, В°F (В°C)-320 to 165 (-196 to 74)
Linear Coefficient of Thermal Expansion, in/in•°F3ASTM E2283.5 x 10-5 (6.3 x 10-5)

1. Available in fire-rated (FR) versions. Visit www.owenscorning.com for product specification data sheets applicable to these products.

2. Sample modified as required to meet applicable test method.

3. XPS foam core values meet ASTM C578 TYPE IV.

4. k means the apparent thermal conductivity. The lower the value, the greater the insulation power.

5. Values at yield or 10% deflection, whichever occurs first.

6. Data ranges from 0.00 to value shown due to the level of precision of the test method.

7. Water vapor permeance decreases as thickness increases.

8. These laboratory tests are not intended to describe the hazard presented by this material under actual fire conditions.

9. Fire performance of FOAMULAR® 4" thick product only. Thicker products may have different fire performance characteristics. Due to limits on the equipment used to test per ASTM E84, Owens Corning® FOAMULAR® XPS Fabrication Billets have not been tested.


Mechanical Solutions

eBooks and Guides

Division 22/23 eBook

The Division 22/23 Mechanical Manufacturer’s Guide eBook is an easy-to-use tool that can be accessed anytime, anywhere to view duct, pipe and HVAC equipment insulation solutions, product data sheets, CSI MasterFormat® three-part system specifications and green building program guides.

Find our Products

Find a Professional


Even though we’re a global company, we’re always ready to answer your questions. Call to speak with an Owens Corning representative so you can start your project right away.