Hydroxypropylmethylcellulose (HPMC) is divided into several types

Hydroxypropyl Methyl Cellulose can be divided into instant and hot soluble types. Instant products quickly disperse in cold water and disappear into the water. At this time, the liquid has no viscosity because HPMC is only dispersed in water and does not truly dissolve. About 2 minutes later, the viscosity of the liquid gradually increases, forming a transparent viscous colloid. 

A hot soluble product that can quickly disperse and disappear in hot water when encountering cold water. When the temperature drops to a certain temperature, the viscosity gradually appears until a transparent viscous colloid is formed. 

Hot melt type can only be used in putty powder and mortar. In liquid adhesives and coatings, it may cause clumping and cannot be used. Instant type, with a wider range of applications, can be used hpmc powder in putty powder and mortar, as well as in liquid adhesives and coatings, without any taboos.