偷換概念的伎倆還是免了吧，老套了。誰告訴你Paint sealant是防漏水的？

“A paint sealant is a sealant that protects cars from ultraviolet rays and acid rain. Paint sealants protect cars' finishes, and can make cars shiny. ”

摘自：https://en.wikipedia.org/wiki/Paint_sealant