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1·Joint sealant gasket of expanded PTFE made of pure PTFE is a continuous low density cord.

膨胀聚四氟乙烯密封胶带是用聚四氟乙烯制成的低密度密封材料。

2·Joint sealant has outstanding hydro-sealing ability. It is resistant to most chemicals at a wide range of temperature and pressures from full vacuum to medium level.

具有优异的流体密封性能，可在较宽的温度范围、压力范围和腐蚀性介质下可靠使用。

3·Using the putty knife, work the sealant into the joint to ensure that the sealant has fully covered the void.

用油灰刀把密封剂填入接合处，确保密封剂全部盖住空洞。

4·The rational working temperature ranges of nozzle sealant were put forward by analysing hot state at nozzle joint gap in the continuous casting process.

通过对连铸水口接缝处热状态的分析，提出了水口接缝密封剂合理的工作温度区间。

5·Then the author has put forward a new protective method, i. e. seal the nozzle joint with a kind of sealant.

分析了国内外现用保护浇注的方法、效果及其存在的问题；