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.
