sealant

/ˈsiːlənt/ 7sat
A sealant is a substance that is used to seal holes, cracks, or gaps. 密封胶

noun [物质名词][机] 密封剂

Apply a coat of sealant if you need to.
需要的话,抹一层密封剂。

单词造句:
网友用“Sealant”造句精选
Sealant such series of the water used for air curing. 此类密封胶系列用空气中的水分进行硫化。
Check with your school about whether it has a sealant program. 核实你的学校是否有提供保护胶的计划。