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apply sealant to sth
这里sealant作不可数名词，表示物质；若指具体产品也可说a sealant。
Apply sealant to the bathroom tiles.
将密封胶涂在浴室瓷砖上。
密封剂
先理解核心含义，再看它在真实句子里的用法。
密封剂
a substance that forms a hard coating to seal a surface
Apply sealant to the bathroom tiles.
将密封胶涂在浴室瓷砖上。
用于密封表面以防流体通过的任何材料。
Any material used to seal a surface so as to prevent passage of a fluid.
一种密封材料,用于在多孔表面上形成硬质涂层。
a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)
由聚合物、填料和颜料组成的混合物,用于填充和密封预期有适度移动的接缝。
A mixture of polymers, fillers, and pigments used to fill and seal joints where moderate movement is expected.
We applied a waterproof sealant to the wooden deck to protect it from rain.
我们给木制露台涂了一层防水密封胶，以防雨水侵蚀。
The plumber used a silicone sealant around the edges of the bathtub to stop water from leaking through.
水管工在浴缸边缘使用了硅酮密封胶，以防止漏水。
After cleaning the tiles, she spread a thin layer of sealant over them and left it to dry.
她清理瓷砖后，在上面涂了薄薄一层密封剂，然后让它晾干。
这里sealant作不可数名词，表示物质；若指具体产品也可说a sealant。
Apply sealant to the bathroom tiles.
将密封胶涂在浴室瓷砖上。
use sealant to... 强调目的；也可换成apply sealant to...，后者更注重涂抹动作。
Use sealant to fix the leak.
用密封胶修补渗漏。
a sealant表示一种具体产品，sealant可数，复数形式为sealants。
This is a sealant for wooden floors.
这是一种木地板密封剂。
Not this
I used sealing glue to fix the crack in the wall.
Use this
I used sealant to fix the crack in the wall.
“sealing glue”是“密封胶”的直译，但英语中表示这类密封材料的标准词是“sealant”，而“glue”主要用于粘合物品，含义不同。这里要表达“密封胶”这一材料，应使用“sealant”。
Not this
Please sealant the gap before painting.
Use this
Please seal the gap with sealant before painting.
“sealant”是名词，表示“密封胶”，不能用作动词。表示“把……密封起来”的动作要用动词“seal”，若需说明所用材料，则用“with sealant”补充。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
涂抹密封胶
You should apply sealant to the bathtub edges to prevent water leaks.
你应该在浴缸边缘涂抹密封胶以防止漏水。
硅酮密封胶
Silicone sealant is often used in kitchens and bathrooms.
硅酮密封胶常用于厨房和浴室。
防水密封胶
Use a waterproof sealant to protect the deck from moisture.
使用防水密封胶保护甲板免受潮湿。
接缝密封剂
The contractor applied joint sealant between the concrete slabs.
承包商在混凝土板之间涂上了接缝密封剂。
密封胶枪
You'll need a sealant gun to squeeze the sealant out of the tube.
你需要一把密封胶枪将密封胶从管中挤出。
裂缝密封剂
Crack sealant is effective for repairing driveway cracks.
裂缝密封剂对于修复车道裂缝很有效。
发长 /iː/ 音 (如 sea, tea)
Same pattern, same sound
Use sealant naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：sealant 听起来像“seal + ant”，想象一只蚂蚁用密封胶把裂缝封得严严实实。
语域：neutral 常见场景：construction、home repair、industrial maintenance sealant 在此取“密封胶/密封材料”的通用义，属于中性偏正式的科技类词，常见于建筑、工程、家居维修等书面说明或产品标签；日常口语中较少单独使用，多会直接说具体产品名。选择 neutral 作为默认即可。
tenant 和 important 与 sealant 一样以非重读的 /-ənt/ 结尾，但重音元音不同，所以并不押韵。excellent 和 prevalent 以 /-ələnt/ 结尾，拼写和读音都接近 sealant 的 /-lənt/，但不是严格押韵。silent 和 giant 是易混的形近词：它们发 /aɪ/，而 sealant 发 /iː/。
Dictionary facts from ECDICT, WIKTIONARY.
Watch the sound change