
Elastic fire-resistant sealant is a fire-resistant sealant with a certain degree of elongation (displacement) capability.
Introduction
Fire-resistant sealant is a sealing material used for blocking, with both sealing and fire-resistant properties. It is a measure-type fire-resistant material.
Fire-resistant sealant is a molecularly separated plastic material, therefore, the evaluation of its fire rating often uses the "Test Method for Burning Performance of Plastics - Limiting Oxygen Index Method" (GB/T 2406-93) and the "Test Method for Burning Performance of Plastics - Horizontal and Vertical Methods" (GB/T 2408-1996).
The limiting oxygen index refers to the minimum oxygen concentration required to sustain the combustion of a test specimen in a mixed gas stream of oxygen and nitrogen under specified conditions, expressed as the percentage by volume of oxygen. When using the oxygen index (OI) for evaluation, the sample test is performed according to GB/T 2406-93 to determine the oxygen index. The correspondence between the oxygen index (OI) of the material and its flame retardancy is as follows: OI < 28 is highly flammable.
When using GB/T 2408-1996 for evaluation, the sealant generally uses the vertical method for testing, and is divided into three levels from high to low according to the test results: FV-0, FV-1, FV-2.
Classification
Intumescent fire-resistant sealant: It has the characteristic of expanding in volume when heated in a fire.
Scope of Application
Fire-resistant sealant is a building fire-resistant sealant with low hardness, good adhesion, and good fire resistance. It is mainly used for bonding and sealing various fire doors, fire-resistant sealing of various layers in curtain wall projects, fire-resistant sealing of various door and window glass installations, and fire-resistant sealing for waterproofing, moisture-proofing, and decoration in public places such as hotels, guesthouses, and theaters.
Application
Intumescent fire-resistant sealant is mainly used for sealing single or small-sized bundled cables passing through holes, and for filling gaps between cables. Elastic fire-resistant sealant is mainly used for fire-resistant sealing of building joints (such as between curtain walls).

Fire-resistant sealant
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