Air-entraining and waterproofing additives for masonry cements


AEC additives are air-entraining and waterproofing agents formulated for grinding masonry cements.
AEC tailor-made additives are formulated for the production of high-quality masonry cements Type N, M and S complying with the standards ASTM C91-95c and ASTM C270.


AEC additives increase air entrainment and water retention, improve workability and waterproofing characteristics, control the setting time, and extend the board life.
Air entrainment can reach 15% to 21%, improving the workability of the product.
Water retention can easily exceed 90%.
AEC additives’ resulting entrainment of air in micro-bubbles, homogeneously distributed, improves workability, yield per surface unit and resistance to freeze/thaw cycles.
Microbubbles, with controlled diameter and high stability, act as a lubricant between mortar layers, improving flow as well as workability.
AEC additives’ resulting water retention prevents the mortar’s mixing water from migrating toward the external substrate, thereby improving adhesion and reducing plastic shrinkage.


AEC additives are formulated to improve the characteristics of masonry cements.
They must be added to the mill during grinding for correct dispersion and to maximize performance.

Chemical-physical data

Please refer to the appropriate Safety Data Sheet.

Dosage: 0.08% to 0.3%

The optimum dosage depends on the type and fineness of the masonry cement.
In any case, optimum dosage must be determined through a reliable industrial trial, preferably with the help of MAPEI’s Cement Additives Division (C-ADD) technicians.
AEC additives should be added to the clinker on the mill’s feed conveyor belt or sprayed in the first mill compartment utilizing a membrane or piston dosing pump.


AEC additives are available in plastic totes measuring 275 U.S. gals (1 041 L) and in bulk tankers with 45,000 lbs. (20 412 kg) in capacity.


Maintain the additives at a temperature above 32°F (0°C). In normal conditions, shelf life for AEC additives is at least 2 years.

Technical assistance

MAPEI’s C-ADD specialists are available to optimize the grinding circuit during the industrial trials and to suggest the most suitable dosage system.

Safety instructions

During the usage of AEC, respect the usual rules of industrial hygiene and manipulation of the chemical products. For details, please refer to the SDS.



Although the technical details and recommendations contained in this Technical Data Sheet correspond with the best of our knowledge and experience, all the above information must, in every case, be taken as merely indicative and subject to confirmation after long-term practical applications.
For this reason, anyone who intends to use the product must ensure beforehand that it is suitable for the envisaged application.
In every case, the user alone is fully responsible for any consequences resulting from the use of the product.


Technical Data Sheet