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Defoamers for construction are admixtures used in concrete and mortar to inhibit bubble formation and eliminate existing bubbles. Their mechanism of action involves reducing the surface tension of the system, rapidly spreading to the foam liquid film interface, disrupting its mechanical equilibrium, and causing the film to drain, thin, and ultimately collapse. Based on chemical composition, they can be classified into silicone-based, polyether-based, and mineral oil-based types. Mineral oil defoamers are widely used in building materials due to their lower cost.
Construction defoamers are mainly used in dry-mix mortars, concrete, and cement-based products such as self-leveling mortars, grouts, waterproofing mortars, and tile adhesives, to eliminate air bubbles introduced during mixing or application. Their core functions are to improve the compactness of the structure, reduce surface pinholes and hollowing, enhance impermeability and compressive strength, while also improving surface finish and construction efficiency.
| Item | Standard | Testing Result |
| Appearance | White fluffy Powder | Confirmed |
| PH | 6.0-7.0 | 7.0 |
| Active Substance | ≥70% | Qualified |
| Bulk Density | ≤0.25 | 0.25 |
| Moisture(%) | ≤0.05 | 0.01 |
We offer various grades of defoamers products. Please contact us for more information.
MIXEON recommends DEFOAMER MF305, a grade specially designed for construction products.
Mixeon® MF305 defoamer for cement-based systems suppresses bubbles, reduces porosity, and increases compactness and compressive strength. Good compatibility. Suitable for self-leveling compounds, grouts, and waterproofing mortars. VOC-free, low dosage, long-lasting effect. Improves surface structure and ensures durability.
Efficient bubble elimination
Quickly removes air bubbles introduced by mixing, reducing porosity of the slurry.
Increased density and strength
Reduces internal voids, making concrete denser and brighter; increases compressive strength by 15%–18%.
Excellent surface quality
Improves smoothness and finish of mortar surfaces, preventing pinholes and pits.
Low dosage, high efficiency, long-lasting
Recommended dosage only 0.1‰–1.0‰, achieving rapid defoaming and sustained foam suppression.
VOC-free, environmentally safe
Contains no volatile organic compounds, safe to use, and meets environmental requirements.
MIXEON is one of the construction additive brands under the KAIMAOXING Group. For nearly two decades, KAIMAOXING has ranked among China's leading cellulose ether producers, serving partners in over 70 countries. We offer high-quality products including HPMC, HEMC, HEC, redispersible polymer powders (RDP), and various functional additives. In recent years, we have continuously expanded our portfolio to include PCE, gypsum retarders, silicone hydrophobic powders (SHP), and defoamers, establishing ourselves as a true one-stop supplier for our customers. Our core strength lies in our customer-centric approach, backed by extensive industry experience, strict quality control, and a reliable supply chain. Committed to innovation and sustainable growth, we strive to be your trusted global partner, creating lasting value for you.
