The curing time and fire resistance of high-temperature mastic are different due to different specific products and use environments. The following information is compiled according to the search results:

I. Curing time of high temperature cement

(1) curing at room temperature:

At room temperature, the curing time of high temperature cement is usually about 24 hours. For example, some high-temperature mastics basically solidify at room temperature for 0.5 ~ 4 hours.

(2) high-temperature curing:

In high temperature environment, the curing time will be shortened. For example, at 50℃, the curing time is about 4 hours; The curing time is about 15 minutes under the heating and drying environment of 75-100℃.

(3) low-temperature curing:

When the air temperature is lower than 15℃, the curing time will be prolonged. If necessary, appropriate heat sources (such as infrared rays, electric furnaces, etc.) can be used for heating, but the repaired parts should not be directly contacted during heating.

II. Fire resistance of high-temperature cement

(1) Difference of fire resistance of different products:

The fire resistance of high-temperature cement is different according to its composition and use. For example, the fire resistance of some high-temperature cement can reach 1680℃, while that of other products can reach 1700℃.

(2) Use temperature range:

Some high-temperature mastics have a wide temperature range, such as 1200℃ to 1700℃, and are suitable for various high-temperature environments.

(3) Special purpose fire resistance:

For some special-purpose high-temperature cement, such as blast furnace and hot blast stove, its fire resistance may be higher to meet the requirements of extreme high-temperature environment.

To sum up, the curing time and fire resistance of high-temperature cement will be different due to product type, use environment and specific process. In practical application, suitable high-temperature cement products should be selected according to specific needs, and the construction and use should be carried out in strict accordance with the product instructions.