- Product Name: Concrete Defoamer
- Main forms: Powder & Liquid
- Appearance: White or light grey powder, transparent liquid
- CAS No. 9003-13-8
- HS Code:3402420000
- Applications: grouting materials, self-leveling mortar, sealant mortar, out and wall putty, gypsum board, bonded mortar, plaster, waterproof mortar, various coatings.
Concrete defoamer or anti foaming agent is a chemical additive specially used to eliminate bubbles in concrete. Its main function is to quickly adsorb and destroy the bubble film through its surfactant components during the mixing process of cement concrete, so that the bubbles burst quickly, thereby achieving the purpose of eliminating bubbles. It can not only effectively reduce the number of bubbles in concrete, but also improve its distribution state, making the concrete more uniform and dense. Concrete defoaming agent is mainly used for defoaming in the production process of cement mortar, water reducer, concrete, asbestos tile, calcium silicate board, putty powder, slurry, enhancer, etc.
Main Models of Defoamer Powder
SDF-05 defoaming agent is a composite product formulated from polyether surfactants and specialized dry powder materials. It appears as a white to light grey powder and is designed to deliver high defoaming efficiency at a low dosage. This chemical features low dosage and fast defoaming speed (30–60 seconds after water addition) and is mainly used in cement-based materials to effectively reduce bubbles, especially for grouting, self-leveling cement, and gypsum products processed at 15–35 °C.
SDF-07 is a high-performance powdered defoamer formulated with polyether surfactants. It appears as a white to light grey powder and delivers excellent defoaming efficiency at a low addition level. The product offers low dosage and rapid defoaming within 30–60 seconds after water addition, and is specially designed for cement-based materials used at –5 to 25 °C, effectively reducing air bubbles in grouting materials, self-leveling cement, gypsum products, and other applications with high surface quality requirements.
Both SDF-06H and SDF-08H are defoamers specifically developed for high-temperature construction environments in summer. In high temperatures, the slurry temperature is elevated, resulting in significant flow loss. Conventional defoamers lose effectiveness under such conditions, causing trapped air bubbles in the slurry, which can lead to bulging. DF-06H maintain excellent defoaming performance in high temperatures, quickly removing air bubbles introduced into the mortar by mechanical stirring or chemical reactions. They also eliminate black oil spots and stains on the surface of the slurry. Defoaming is typically completed within 40-90 seconds after mortar mixing.
These two products can be stored for a long time after being mixed with cement mortar materials. They are especially suitable for systems requiring surface quality, such as topping self-leveling compounds, grouting materials, and cement or gypsum precast components, making it ideal for use in high-temperature environments.
| Item | SDF-05 | SDF-07 | SDF-06H | SDF-08H |
| Appearance | White to light grey powder | |||
| Bulk density(kg/m3) | 300-450 | 300-450 | ||
| PH value(10% in water) | 7.5-9.0 | 7.0-7.5 | 7.0-7.5 | |
| Solubility | Water repellency, dispersible in water with partial precipitation | |||
| Dosage | Both SDF-05 and SDF-07 should be dry-blended with the other dry ingredients at a minimal dosage of 0.01% to 0.2% by total weight of components. | The recommended dosage of defoamer chemical in various systems is 0.1‰ to 1.0‰ of the system. For general defoaming requirements, a dosage of 0.1‰ to 0.3‰ is sufficient. If surface quality is a concern, the dosage can be increased. The optimal dosage should be determined through testing. | ||
| Packing | 25kg bags | |||
Technical Specifications of Defoamer Liquid
| Detection index | DF-17 | DF-25 | DF-27 | MO-01 |
| Appearance | milky white | transparent | transparent | milky to pale yellow |
| Density (g/l) | 0.9-1 | 0.94-1 | 0.94-1 | 0.94-0.97 |
| Active ingredients（%） | 15±1 | 100 | 100 | 99-100 |
| Application | They all have a good compatibility with acrylic emulsion and polycarboxylate superplasticizer, therefore, they can be widely used in various coatings, mortars and concretes with requirements for bubbles, such as various types of paint, commercial mortar, commercial concrete, prefabricated components, etc. | Due to its extremely low VOC, this product has good compatibility with VAE emulsion, acrylic emulsion, styrene-butadiene emulsion, etc., so it is widely used in various coatings that require bubbles, especially for building interior wall coatings. | ||
| Dosage | These defoamer chemical should be added at a minimal dosage of 0.01% to 0.5% by total weight of components The actual dosage should be determined through suitable tests prior to production and application | |||
| Packaging | 200kg/drum,1000kg/drum | |||
Why Do You Need to Use Concrete Defoaming Agents
- Improve the quality of the project. After using the defoamer, the surface of the concrete is smoother and flatter, without bubbles or holes, which improves the appearance quality of the concrete. Due to the reduction of bubbles, the density and strength of the concrete are also enhanced, thereby improving the overall quality of the project.
- Improve construction efficiency. The addition of defoamer powder or defoamer liquid makes the mixing and pouring process of concrete smoother, reduces construction interruptions and rework caused by excessive bubbles, and improves construction efficiency.
- Strong adaptability. The defoamer chemical is suitable for various types and grades of cement concrete, and can play a good defoaming effect whether it is on-site mixing or prefabricated component production.
- Environmentally friendly and harmless. Modern cement defoaming agents are mostly made of environmentally friendly materials, which are non-toxic and harmless, and will not harm the environment and human health. Its biodegradability is also good, which is in line with the development trend of the green and environmentally friendly construction industry.
- High Efficiency and Rapid Defoaming. Delivers superior defoaming performance with a significantly lower addition level compared to traditional defoamer powder. Defoaming is typically completed within 30 seconds after mixing with water, ensuring fast and reliable air release.
- Excellent Surface Appearance Improvement. Anti foaming agent effectively eliminates black spots, dark marks, and surface defects in mortar systems. Particularly suitable for cement-based materials such as grouting compounds, self-leveling cement, gypsum products, and other applications with high surface appearance requirements.
- Low Dosage, Cost-Effective Performance. The product achieves outstanding defoaming efficiency at minimal dosage levels, helping reduce overall material consumption and application costs.
- Improved Density and Visual Quality. Efficiently controls foam generation within cement mortar systems, resulting in denser concrete structures and a brighter, more uniform finished appearance.
- Safe and Environmentally Friendly. Non-toxic and odorless, the defoamer chemical supports safe production processes and poses no risk of environmental pollution, meeting modern safety and sustainability requirements.
Air trapped in concrete can cause concrete to foam and feel light, weak, and brittle. Using a quality defoamer in your concrete countertop mix will help increase the density and strength of your concrete.
Defoamers don’t make air trapped in concrete magically disappear. They work by breaking up the foam that concrete creates during the mixing process. Common ingredients that can create foam are polymers, high-range water reducers, and pigments.
These defoaming agents help prevent foam from forming in the first place, so air stirred into the concrete during the mixing process doesn’t form foam.
Tiny air bubbles can get stuck inside sand, fibers, and thick, hard concrete. Defoamers break these tiny bubbles apart, creating larger bubbles. Larger bubbles have a better chance of escaping because they can force their way up and out of the mix, but the mix must allow these bubbles to rise and escape on their own.
Because of how they work, defoamers are most effective at removing trapped air when the concrete is very fluid. For this reason, defoamers are best used in conjunction with a strong water reducer like PCE.
Generally, defoamers are added to the concrete mixing plant in a certain proportion and mixed with cement, aggregates, etc. The specific amount of addition needs to be adjusted according to the specific formula of concrete and engineering requirements.
During use, attention should be paid to stirring evenly to avoid local concentration of defoamers in concrete, which will affect its effect. In addition, excessive use may cause the performance of concrete to deteriorate, while insufficient use may not achieve the expected defoaming effect.
Why Choose Kingsun company
- As a leading manufacturer & exporter in China, Kingsun has more than 15+ years’ experience in construction chemicals industry.
- Kingsun has its own factory, large warehouse and the advanced production lines. So we can ensure sufficient supply and timely delivery.
- All of our products have passed many certifications, such as ISO, SGS,etc.
- Kingsun concrete defoaming agents have been exported to Peru, Bahrain, Brazil, Colombia, Argentina, Mexico, Ukraine, Uzbekistan, Jordan, Nigeria, Saudi Arabia, United Arab Emirates, Malaysia, Singapore, Vietnam，Thailand, Indonesia, Philippines, Pakistan, Bangladesh, India, etc.
- We always provide the high-quality products, competitive prices and good services for all the customers. Welcome to inquiry!