Efflorescence is a common problem in cement-based, gypsum-based, and lime-based building materials, especially in humid or rainy environments. It usually appears as white salt deposits, powdery stains, or surface marks on walls, putty, plaster, render, grout, or decorative mortar.
For building material manufacturers, efflorescence is not only a surface appearance issue. It may affect coating adhesion, surface durability, color stability, and the long-term performance of the wall system.
Why Does Efflorescence Happen?
The basic cause of efflorescence is:
Moisture migration + soluble alkali substances + surface crystallization
Cement, lime, gypsum, and mineral substrates may contain soluble alkaline substances. When moisture enters the wall through rain, humidity, groundwater, or construction water, it can carry these soluble salts to the surface. After the water evaporates, white crystalline deposits remain on the wall.
If this problem continues, the wall surface may become powdery, stained, hollow, cracked, or peeled. In some cases, moisture and alkali migration can also damage waterproof layers and coatings, causing a cycle of:
More moisture → more alkali migration → more efflorescence → weaker surface protection
Botai Chemical Alkali-Depressant Powder
Botai Chemical Alkali-Depressant Powder ATA-100 is a highly active efflorescence-inhibiting additive designed for cement-based, gypsum-based, and lime-based mortars.
It contains reactive alkali-neutralizing components that help consume free alkali ions inside the material system. By reducing alkali activity and limiting alkali migration, ATA-100 helps suppress both primary and secondary efflorescence.
In dry-mix mortar formulations, it can help improve surface appearance, reduce white salt deposits, and support better long-term color stability.
How ATA-100 Works
Botai ATA-100 helps control efflorescence mainly through three functions:
Neutralizing free alkali ions
It reduces the amount of soluble alkali available for migration.
Reducing alkali migration
It helps limit the movement of alkaline substances from the inner substrate to the surface.
Improving mortar compactness
A denser mortar structure can reduce capillary channels and make it harder for moisture and salts to move outward.
Together, these effects help build anti-efflorescence protection from inside the formula, rather than only treating the wall surface after problems appear.
Key Benefits
Effective efflorescence control
Helps reduce white salt deposits in cementitious and mineral systems.
Better surface appearance
Supports cleaner wall finishes and improved color stability.
Suitable for primary and secondary efflorescence
Helps control both early and recurring efflorescence problems.
Good formulation compatibility
Compatible with common dry-mix additives such as cellulose ethers, RDP, superplasticizers, retarders, early-strength agents, and water repellents.
Practical for dry-mix manufacturers
Easy to add into mortar, putty, plaster, render, grout, and waterproof mortar formulations.
Application Areas
Botai Alkali-Depressant Powder can be used in:
- Exterior wall putty
- Cement-based plaster and render
- Waterproof mortar
- Tile grout and jointing materials
- Decorative mortar and mineral coatings
- Repair mortar and renovation materials
- Gypsum-based and lime-based mortar systems
It is especially suitable for projects or markets where humidity, rain, moisture return, and wall efflorescence are common concerns.
Need an Anti-Efflorescence Additive for Your Formula?
If your products are facing problems such as white salt deposits, wall efflorescence, coating peeling, moisture return, or color instability, Botai Chemical can help you select a suitable additive solution.
Tell us your application, raw material system, target setting, and current formula problem. We can recommend Botai ATA-100 Alkali-Depressant Powder and support your testing.
Botai Chemical Jacky
Email: [email protected]
WhatsApp: +86-19900925762
