防渗的英文：
impervious

参考例句：

Moisture absorption, waterproof.
吸水、防渗。

impervious是什么意思：
a. 透不过的,不渗透的,无动于衷的,不受影响的

This stage is impervious to rainwater.
这层是防雨的。

To be impervious to the temptation of wealth and high position
富贵不能淫

It was impervious to the shocks and mutations of timeDit was an emblem of time itself
它不受时代的冲击或变迁的影响，它自己就是时间的象征。

Alice was totally impervious to reasoning, relentlessly determined to get her own way.
艾丽斯完全听不进道理，一意孤行。

All surfaces inside the building should be of impervious material to permit thorough washing
建筑里所有的表面都应当用不透水的材料这样可以彻底清洗。