Spray on Air Barrier and Weather Resistant Fire Protective Coating
Air barrier and intumescent fire protection for use on oriented strand board (OSB) or plywood exterior wall sheathing materials as a component of the building envelope air sealing strategy.


Product Overview
No-Burn® Plus Spray Seal™ is an intumescent and air barrier coating in one for use over exterior oriented strand board (OSB) or plywood that will be covered with cladding. Durability features allow up to 6-months of UV and weather exposure providing builders with greater cladding installation flexibility. Compliant with the International Building Code, International Residential Code, and International Energy Conservation Code.

No-Burn® Plus Spray Seal™ works to control air movement and prevent air from leaking in and out, reducing heating and cooling costs, enhancing indoor air quality, and improving comfort.
In accordance with Energy Codes and energy efficiency requirements, lower ACH rates are required and desired. No-Burn® Plus Spray Seal™ helps to reduce the ACH within the building envelope.
In addition to air sealing capabilities, No-Burn® Plus Spray Seal™ provides fire protection, equivalent to fire retardant treated wood (FRTw). All features packaged in a single application, eliminates other products and saves on costs.
Advantages of No-Burn® Plus Spray Seal™:
Enhanced Safety: Achieve fire resistance equivalent to Fire Retardant Treated Wood (FRTw) without compromising on other vital features.
Simplified Installation: Cut down on labor costs with easy application and a single-component solution, saving time and resources.
Versatile Application: Suitable for a wide range of construction projects, from residential homes to commercial and institutional buildings.
Compliance Assurance: Meet and exceed building codes with a reliable, tested, and code-compliant solution, backed by industry-leading performance.

No-Burn Plus Spray Seal™ has significant advantages over other assembly systems due to the ability of the No-Burn Plus
Spray Seal™ to provide fire resistance and act as a water control layer, air control layer and a vapor control layer.
No-Burn Plus Spray Seal Guidelines Full Report
Joseph Lstiburek, Ph.D., P.Eng., Building Science Corporation
Contact us to learn how No-Burn can help meet your project specifications.