The roof was repaired by Charles with sealant and cement.

查尔封和水泥修补了屋顶。

That will create a film of water that then if you put a sealant over it, that will trap the moisture from evaporating.

这会形成一层水膜，然后如果你在上面涂上封，就会将防止水分蒸发。

Shampoos also get fancy with their polymers—some add volume or weight or increase the shine and feel, while others protect from things like UV rays—but, in essence, they all work like waterproofing sealant on a deck.

洗发水的聚合物也很花哨——有些可以增加体积重量善光泽和触感，而有些则可以防止紫外线——但本质上，它们作都像甲板上的那层防水封。