JM Corbond III
JM Corbond III
Johns Manville Corbond III® closed-cell spray polyurethane foam insulation offers and R-Value of R-7 per inch and can be applied in a single pass to a maximum of 3.5 inches, providing superior thermal performance with seamless air sealing and moisture control in a single step. Multiple immediate passes, with no wait time, may also be applied. With high yield and excellent adhesion, it's an ideal choice for high-performing energy efficient commercial, residential and industrial applications.
Complete Coverage: Expands and adheres without shrinking or settling.
Energy-Efficient: Reduces air and moisture infiltration to the building envelope and provides continuous coverage for high thermal performance.
Air Barrier: Prevents leaks when installed at 1” thickness or more.
Moisture Performance: Resists mold growth; meets current vapor retarder codes.
Wide Application Temperature Range: Can be applied between 20°F and 120°F , delivering consistent performance with seasonal versatility.
Faster Installation: Spray easily in a single pass from a minimum of .5" to a maximum of 3.5”. Multiple immediate passes, with no wait time, may also be applied. See Data Sheet for complete information.
Commercial Approvals: NFPA 285 assembly approvals. Appendix X approval for application in unoccupied attics and crawl spaces without a prescriptive ignition barrier or coating.
|SPF Acceptance Criteria||ASTM AC377||Pass|
|Flame Spread||ASTM E84||≤ 25|
|Smoke Development||ASTM E84||≤ 450|
|Fungi Resistance||ASTM C1388||Pass|
|Dimensional Stability||ASTM D2126||< 15% change in volume|
|Nominal Density||ASTM D1622||2 pcf|
|Closed-Cell Content||ASTM D6226||> 90%|
|Compressive Strength (1”)||ASTM D1621||36 psi|
|Water Absorption||ASTM D2842||0.9%|
|Water Vapor Transmission||ASTM E96||0.61 perms @ 1.5"|
|Air Permeance||ASTM E2178-03||0.00055 (L/s)/m at 75 Pa|
|Sound Transmission||ASTM E90-90, ASTM E413-87||36 (STC)|
Product Selector Guide
Exploring the Efficacy of High Lift Spray Foam Insulation White Paper
JM Spray Foam Overview Brochure
TechConnect Sell Sheet
JM Spray Foam Trial and Technical Support Brochure
JM Corbond III Seasonal FAQ
JM Spray Foam Parts and Equipment (Fusion AP)
STC Rating Documents
Spray Foam Certification
Penetrations - Ambient Temperature
Below Grade Wall
Change in Substrate
Floor Slab to Foundation Wall
Framed Floor to Foundation Wall
High Temperature Penetrations
Substrate Joints and Defects
Unvented Attic Insulated Roof Deck
Unvented Attic Insulated Roof Deck V2