Fire Resistant Insulation

Fire Safety

Celbar meets all applicable federal regulations and ASTM standards for fire safety, in accordance with UL 723 and ASTM C-739-05b characteristics.

Flame Spread and Smoke Developed are two key metrics regarding how insulation will perform in a fire.

Fire Spread refers to the speed at which flames spread along the surface of the insulating material. Smoke Developed refers to the amount of smoke that is produced while the product burns. In most house fires, it’s not the flames that cause injury or death, but rather smoke inhalation. Smoke also creates confusion and can obscure fire exits.

In one study, the ratings show that cellulose fire resistant insulation outperforms the competition on these two key metrics. On smoke developed, less than 450 is a passing score. In order to pass, Open Cell Foam needs an additional component to meet the requirements, such as Ure-k, a true 15 minute thermal barrier.

Insulation Type
Flame Spread
Smoke Developed
Celbar Fire Resistant Insulation 15 0
Fiberglass 0-5 <50
Open Cell Foam 25 <450

Celbar is UL Rated for Flame Spread and Smoke Developed with the highest available rating. A specially formulated borate compound gives Celbar fire resistant insulation a Class 1 fire rating. Additionally, Celbar provides a barrier that resists penetration by fire.

For further information regarding Fire-Rated Partitions, click here.

Celbar Testing

Underwriters Laboratories

R&D Services
Smoldering Combustion Test Report: Passed
Corrosiveness Test Report: Passed
Moisture Vapor Sorption Test Report: Passed
Test Report for Resistance to the Growth of Fungi: Passed
Odor Emission Test Report: Passed
Tests are available upon request.