Reference :: FAQ
Are FlameSeal® products approved by testing laboratories?
All FlameSeal® products have been tested by various testing laboratories and passed stringent testing to meet required standards based on application. Please refer to our Test Information page for specific tests for each product.
Are FlameSeal® products dangerous?
All FlameSeal® products are non-toxic, non-hazardous, non-corrosive, and not harmful to plants, animals or humans. They contain no asbestos or halogens. They are water based for ease of use and application and need no special equipment or tools for application.
Fire resistance - what is an "hourly rating" and does it compare to flame spread?
A fire-resistive rating is the time that exterior wall construction can withstand fire exposure as determined by a standard fire test. Wall construction can be classified as 4-hour, 3-hour, 2-hour, 1-hour and non-rated construction. This rating is determined by a different test, known as "Standard Methods of Fire Tests of Building Construction and Materials" NFPA No. 251, ASTM E 119, UL No. 263).
How do flame retardants help?
Flame retardants prevent the spread of flames and the smoke development of a fire to allow people to evacuate safely, preventing injury or death due to flame spread and toxic fumes developing during a fire. They also help to protect against property damage or destruction by fire.
What are the different fire ratings and codes?
Flame Spread is based on ASTM E-84/UL 723/NFPA 255,
"Test for Surface Burning Characteristics of Building Materials."

Roofing Classes are based on ASTM E-108/UL 790,
"Test for Fire Performance of Roofing Materials."

Hourly Ratings are based on ASTM E-119.
What is a Flame Retardant or Fire Retardant?
Flame retardants are chemical compounds which prevent a fire from spreading by eliminating one or two of the necessary elements for a fire to generate itself. Without oxygen or fuel a fire cannot spread thus retarding flame spread which in turn prevents a fire from generating itself. FlameSeal® products eliminate fuel and oxygen from an ignition point to prevent a fire from starting.
What is an intumescent coating?
An intumescent coating is a coating that will insulate the surface from the heat for a short period of time by swelling up and expanding when exposed to flame, producing a heat resistant charred surface.
What is Flame Spread?
Flame-spread, used to describe the surface burning characteristics of building materials. The most widely recognized laboratory test of such fire characteristics is defined in several tests:

Method of Test of Surface Burning Characteristics of Building Materials.

These are commonly known as the tunnel test or "Method of Test of Surface Burning Characteristics of Building Materials. (NFPA No. 255, ASTM E 84, UL No. 723).

The flame spread is a number, calculated from the results of a test, which indicates the relative rate at which flame will spread over the surface of the material as compared with flame spread on asbestos-cement board, which is rated 0, and on red oak, which is rated 100.

Note that this rating is not the rate at which the flame actually spreads along the surface and is not at all an indication of the fire resistance of the material.

For the purpose of applying flame spread limits to interior finish material, NFPA Standard No. 101 — The Life Safety Code groups flame spread ratings into five classes (A-D), the top 3 are listed below. The UBC and BOCA codes use the I-II-III designation.
Class A or "I" - Flame-spread 0-25, smoke developed 0-450.
Class B or "II" - Flame-spread 26-75, smoke developed 0-450.
Class C or "III" - Flame-spread 76-200, smoke developed 0-450.

NFPA 101 primarily applies this classification to interior wall and ceiling finish materials. Roof coverings must meet a different set of criteria.
What is the difference between fire retardant and fire resistance?
A fire retardant material slows burning across the surface of a combustible substrate. A fire resistive material delays heat penetration through a substrate.
What is the purpose of the flame spread test?
The purpose of this test method is to determine the relative burning behavior of the material by observing the flame spread along the specimen. Flame spread and smoke developed index are reported.
What is the test method for flame spread?
The tunnel test measures how far and how fast flames spread across the surface of the test sample. In this test, a sample of the material 20 inches wide and 25 feet long, is installed as ceiling of a test chamber, and exposed to a gas flame at one end. The resulting flame spread rating (FSR) is expressed as a number on a continuous scale where inorganic reinforced cement board is 0 and red oak is 100.
Non Toxic, Non Hazardous
Not Harmful to Plants or Animals,
[ No PBDes - Polybrominated Diphenyl ethers]