How to choose the fire resistance and heat resistance of fire-proof sealing strip？

fire-protection rating Fire-proof sealing strips must have corresponding fire-proof grades.

According to the different application places, the fire protection grade is also different.

For example, evacuation passages and facilities and equipment places need higher fire resistance codes (such as A1.5, C4.0, etc.).

In addition, the fireproof performance of the sealing strip needs to be tested and certified, so as to ensure that it can expand and block the crack of the door in case of fire and prevent the spread of smoke and flame.

Weather resistance and physical properties The sealing strip of fire door should have good weather resistance and be stable in cold and hot environment. Specifically, the sealing strip should have the following characteristics: Weather resistance: ability to resist cold, heat, dryness and humidity, and good corrosion resistance to rain, snow and water erosion.

Physical properties: including hardness, tensile strength, tensile elongation, compression and permanent deformation, low temperature brittleness temperature, etc.