很多裝修新手以為膩子粉都差不多，隨便買一種就行。這個認知錯誤，代價可能是墻面開裂、起皮、脫落。

Many novice decorators think that putty powder is almost the same and just buy any one. The cost of this cognitive error may be wall cracking, peeling, and detachment.

膩子粉到底是什么？ 膩子粉是漆類施工前對墻面進行預處理的一種表面填充材料。它的核心任務只有兩個：填平孔隙、矯正偏差，為后續(xù)刷漆或貼壁紙?zhí)峁┮粋€平整光滑的基底。膩子粉按使用場景分為內(nèi)墻膩子和外墻膩子兩大類，兩者配方完全不同，絕對不能混用。

What exactly is putty powder? Putty powder is a surface filling material used for pre-treatment of walls before paint construction. Its core tasks are only two: filling in pores, correcting deviations, and providing a smooth and even substrate for subsequent painting or wallpaper application. Putty powder can be divided into two categories based on usage scenarios: interior wall putty and exterior wall putty. The formulas for the two are completely different and must not be mixed.

核心區(qū)別一：原料不同。 內(nèi)墻膩子粉主要以雙飛粉（大白粉）或滑石粉為原料；外墻膩子粉則以白水泥為主要原料。外墻膩子要抵抗風吹日曬，所以膠性大、強度高。外墻膩子粉的耐水性和硬度遠強于內(nèi)墻膩子粉。

Core difference one: Different raw materials. Interior wall putty powder is mainly made of double fly powder (white powder) or talcum powder as raw materials; The exterior wall putty powder is mainly made of white cement. Exterior wall putty needs to resist wind and sun exposure, so it has high adhesiveness and strength. The water resistance and hardness of exterior wall putty powder are much stronger than those of interior wall putty powder.

核心區(qū)別二：耐水性天差地別。 外墻膩子遇水不會軟化；內(nèi)墻膩子（非耐水型）遇水就會軟化，用指甲輕輕一刮就能刮出痕跡。

Core difference two: Water resistance varies greatly. Exterior wall putty will not soften when exposed to water; Interior wall putty (non water-resistant type) will soften when it comes into contact with water, and can be easily scraped off with a fingernail.

核心區(qū)別三：環(huán)保標準不同。 外墻膩子膠性大、強度高，環(huán)保指數(shù)相對稍低；內(nèi)墻膩子綜合指數(shù)較好，健康環(huán)保。重要提醒：外墻膩子可以用在室內(nèi)，但內(nèi)墻膩子絕對不能用在室外。外墻膩子環(huán)保性不及內(nèi)墻膩子，室內(nèi)還是選內(nèi)墻膩子更安心。

Core difference three: Different environmental standards. Exterior wall putty has high adhesive properties, high strength, and relatively low environmental protection index; The comprehensive index of interior wall putty is good, healthy and environmentally friendly. Important reminder: Exterior wall putty can be used indoors, but interior wall putty must not be used outdoors. Exterior wall putty is less environmentally friendly than interior wall putty, so it is more reassuring to choose interior wall putty for indoor use.

內(nèi)墻膩子又分兩種：普通型（Y型）和耐水型（N型） 。普通型適用于干燥環(huán)境，粘結強度要求≥0.30MPa；耐水型適用于廚房、衛(wèi)生間等潮濕環(huán)境，粘結強度要求≥0.50MPa，浸水后仍要≥0.30MPa。耐水型膩子手感細膩、觀感柔和，污染后可直接擦洗，還能提高涂料的性能和使用壽命。

There are two types of interior wall putty: ordinary type (Y type) and water-resistant type (N type). Ordinary type is suitable for dry environments, with a bonding strength requirement of ≥ 0.30MPa; Waterproof type is suitable for humid environments such as kitchens and bathrooms, with a bonding strength requirement of ≥ 0.50MPa, and still ≥ 0.30MPa after immersion in water. Waterproof putty has a delicate hand feel and a soft appearance. It can be directly cleaned after contamination and can also improve the performance and service life of the coating.

一句話總結：室內(nèi)用內(nèi)墻，室外用外墻；潮濕區(qū)域用耐水型，干燥區(qū)域用普通型。千萬別混用，也別貪便宜買錯類型。

Summary in one sentence: Interior walls for indoor use, exterior walls for outdoor use; Waterproof type is used in humid areas, and ordinary type is used in dry areas. Don't mix them up, and don't be tempted to buy the wrong type at a low price.