White High-elasticity Fireproof Sealant for Fire Doors. Manufacturer of Zhentai Fireproof Sealant

Fireproof sealant is a sealing material for plugging.

It has the dual functions of sealing and fire prevention.

It belongs to the measure-type fireproof material.

Fireproof sealant is a polymer plastic material.

Therefore, the evaluation of its fireproof grade

often adopts

"Test method for burning behavior of plastics - Oxygen index method"

(

GB/T2406-93

)

,

"Test method for burning behavior of plastics - Horizontal and vertical burning test" (

GB/T2408-1996

).

Oxygen index refers to the minimum oxygen content required for the solid specimen to maintain balanced

combustion in a mixed oxygen-nitrogen gas flow under specified conditions.

It is expressed as a percentage by volume of oxygen. When evaluating using the oxygen

index (

OI

), conduct sample tests according to

GB/T2406-93

and calculate to determine

the oxygen index.

The corresponding relationship between the oxygen index

(OI)

of the material and its flame retardancy is as follows:

OI

<

23

Combustible.

OI

between

24

~

28

is slightly flame-retardant.

OI

between

29

~

35

is flame-retardant.

OI

>

3

6

is highly flame-retardant.

When evaluating using

GB/T2408-1996

, the sealant is generally evaluated using the vertical method.

Test. According to the test results, they are divided into three levels from high to low:

FV-0

,

FV-1

,

FV-2

.

It is mainly used for the sealing of single or small-sized bundled cable penetration holes and for filling the gaps between cables.

It is mainly used for fireproof sealing of building joints (such as curtain wall gaps).