To provide a more understandable explanation, the main difference between interior and exterior walls lies in their application to indoor and outdoor environments.

外墻建筑裝飾產(chǎn)品對耐候性都有一定的要求，這里的耐候性就是氣候變化（風(fēng)吹、日曬、雨淋），基于這個要求產(chǎn)品的強(qiáng)度上就一定要有保證。所以外墻膩子至少要有耐水的要求，多數(shù)會用水泥作為膠凝材料。

Exterior wall building decoration products have certain requirements for weather resistance, which refers to climate change (wind, sun, rain). Based on this requirement, the strength of the product must be guaranteed. So exterior wall putty must at least have water resistance requirements, and most will use cement as the bonding material.

內(nèi)墻產(chǎn)品對于耐候性沒有硬性要求，所以就會有普通膩子的應(yīng)用，當(dāng)然也就有耐水膩子。這就是為什么會出現(xiàn)普通膩子和耐水膩子的區(qū)別。

Interior wall products do not have strict requirements for weather resistance, so there will be the application of ordinary putty, and of course, there will also be water resistant putty. This is why there is a difference between ordinary putty and water resistant putty.

還有內(nèi)墻產(chǎn)品因為要在室內(nèi)應(yīng)用一般對環(huán)保要求較高，當(dāng)然這里不是說外墻就不環(huán)保，這是相對的。畢竟在室內(nèi)應(yīng)用的環(huán)境存在一個密閉使用的過程，所以對物質(zhì)釋放是有要求。5.外墻膩子可以當(dāng)內(nèi)墻用，但是內(nèi)墻膩子是一定不能到外墻用的。這里更主要的區(qū)別就是對耐候性的要求。外墻要高于內(nèi)墻。6.如果對普通膩子和耐水膩子還有疑問可以參考我的歷史回答。

There are also interior wall products that generally have high environmental requirements for indoor applications. Of course, this does not mean that exterior walls are not environmentally friendly, which is relative. After all, there is a closed use process in indoor applications, so there are requirements for substance release. 5. Exterior wall putty can be used as an interior wall, but interior wall putty must not be used on the exterior wall. The main difference here is the requirement for weather resistance. The outer wall should be higher than the inner wall. If you have any questions about ordinary putty and water resistant putty, please refer to my historical answer.

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