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HPMC Dry Mix Mortar Application Guide

Author: venusgeng

Nov. 16, 2022

34 0 0

Tags: Construction & Real Estate

Construction mortars include plastering mortars, masonry mortars, tile adhesives, caulks, and flooring mortars. Good water retention is important in construction mortars when applied to highly absorbent substrates. HPMC will provide excellent performance in dry mix mortars. The open time of a construction mortar is the ability of the mortar to maintain its initial compatibility for a certain period of time after mixing, even if it is applied to a porous (highly absorbent) substrate. Products with good water retention lose very little water, and this small amount is absorbed by the substrate.


Main dry mix applications.

Dry mortar mixes are used for many different applications in the construction of buildings. Some of these applications are universal, while others are specific to certain regions or countries.


High Water Retention HPMC for Dry Mix Mortar

High Water Retention HPMC for Dry Mix Mortar

a. Cement-based tile adhesives

b. Plaster and plaster based on gypsum or cement

c. External insulation composite systems (ETICS)

d. Tile grouting

e. Self-leveling bedding and leveling layers

F. Touch-up mortars

G. Bricklaying mortars

H.Cement waterproofing


Advantages of HPMC

Cellulose ethers play an irreplaceable role in the production of construction materials, especially in dry-mix mortars. Especially in the production of special mortars (modified mortars), it is an indispensable and important component.


1. Easy mixing, no agglomeration

As an additive, cellulose ethers are vital when mixing dry powder products by hand. The lubricating properties of cellulose ethers reduce friction between particles, saving time and making thorough dispersion easier.


2. Improved workability

The lubricating properties of HPMC improve workability, making dispersion easier and increasing efficiency.


HPMC for Dry Mix Mortar

 HPMC for Dry Mix Mortar

3. Good water retention

HPMC increases the water retention of the adhesive, minimizing absorption by the substrate and tiles. This extends the open time and leads to increased productivity as the adhesive can be applied over a larger area. Cellulose also extends the shelf life and canning period of premixed adhesives, extending their use over a longer period of time.


4. Enhanced adhesion and slip resistance

Cellulose products enhance adhesion, even at high water-to-solids ratios, ensuring better results and preventing sagging. HPMC can help your product resist slippage, a benefit that tile layers will appreciate.


How do I make a mortar mix?

When using a mortar mix for tiling, choose a thin mortar, also known as dry mortar, dry adhesive mortar, or simply 'thin mortar'. The mortar forms a strong adhesive in a thin layer, making it the best choice for tiling. Mixing thinners is comparable to mixing standard mortars.


The amount of water required for the job and the amount of mixing is determined by the manufacturer's recommendations. The standard mortar mixing ratio is one part to four parts water.


Pour the water into the mixing container.

Add the mixture to the container.

Mix for approximately five minutes.

Allow the thin mixture to stand for 10 minutes.

Stir for a further five minutes to check the consistency. If the tile mortar mixture has the appearance of peanut butter and is of sufficient thickness, it is ready for use.


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