KASTAR 25 Low VOC Acrylic Water-Based Fireproof Coating
KASTAR 25 Low VOC Acrylic Water-Based Fireproof Coating is a high-performance intumescent solution designed for superior fire protection. Featuring a low-VOC, water-based formula, it provides a reliable thermal barrier for steel and timber. This eco-friendly coating ensures structural integrity during fire emergencies while maintaining a professional finish.=
KASTAR 25 Product Description
KASTAR 25 Low VOC Acrylic Water-Based Fireproof Coating is engineered for professional engineering projects that demand the highest standards of safety and environmental responsibility. Utilizing advanced intumescent technology, this coating expands when exposed to extreme heat, forming a dense carbonaceous char that insulates substrates and significantly delays structural failure during fire incidents.
Formulated with premium acrylic emulsions, KASTAR 25 Fireproof Coating provides excellent adhesion to primed steel, timber, and other construction materials. Its water-based, low-VOC composition ensures a safer application environment, making it the preferred choice for indoor commercial spaces, high-rise buildings, and sensitive industrial facilities where air quality is a priority.
This fireproof solution combines aesthetic versatility with rigorous protection. KASTAR 25 Fireproof Coating is easy to apply and fast-drying, enabling high-efficiency construction workflows. Its durable finish resists cracking and peeling, ensuring long-term fire safety and reducing maintenance overhead for large-scale infrastructure and commercial developments.
Technical parameters
| Color | White/Gray Customized |
| Coating | Matte |
| Proportion | -kg/liter |
| Volume solids | 75±5% (theoretical value) |
| Typical thickness | Dry film thickness 300-1500 microns ( 12 -60 mils) Equivalent to wet film thickness 400 -2000 microns ( 16-80 mils) |
| Theoretical coating rate | At 750 μm dry film thickness and stated volume solids, 1 m ²/l40 sq. ft./US gal. at 30 mils dry film thickness and stated volume solids |
| Actual coating rate | kg/m2 (based on 0.75mm dry film) |
| Construction method | Brushing, spraying |
| Thinner | Water |
| Tool cleaning | Water |
| Drying time | Surface drying: about 60 minutes, 23°C, 50% relative humidity |
| Recoating time | See construction instructions |
| Ambient temperature | Minimum: 5°C, Maximum: 50°C . Avoid coating at relative humidity above85% |
| Substrate temperature | Minimum: 3 ℃above dew point |
| Packing Specifications | – |
| Storage and Product Expiration Date | The warehouse for storing paint must be set up in a cool, ventilated and dry place with a temperature above 0℃. After opening, the product needs to be kept sealed and used up as soon as possible. |
KASTAR 25 Coating Features
- Certified Fire Resistance: Provides critical time for emergency evacuation and structural protection.
- Low VOC & Non-toxic: Eco-friendly water-based formula suitable for indoor environments.
- Strong Surface Bonding: Superior adhesion to various primers and construction substrates.
- Intumescent Technology: Expands rapidly under heat to form a powerful thermal barrier.
- Weather & Aging Resistance: Maintains stable fire-retardant properties over years of service.
- Cost-Effective Application: Optimized for airless spraying to reduce labor time on large projects.
Fire-retardant
Low VOC
High Adhesion
Heat Insulation
Non-toxic
Rapid Drying
Durable Finish
Eco-friendly
How to Use
The best results can be achieved by airless spray application. When brushing , multiple coats may be required to achieve the specified total system dry film thickness.
To achieve the best drying conditions, it is recommended to apply more than 2 coats when the dry film thickness is greater than 500 microns . Pay attention to the minimum overcoating interval between coats.
In order to obtain the best construction and drying performance, the air and substrate temperature must be greater than 5 °C and the relative humidity must be less than 85%. The coated surface temperature must be at least 3°C higher than the dew point.
When constructing in a confined space, ensure adequate ventilation.
The final appearance of the product depends on the construction
method. For visible areas, it is best to use the spraying method for construction. In order to obtain a high decorative surface, other treatments may be required.(regardless of whether there is topcoat) should be protected and avoid contact with static water and flowing water. The product cannot be used in areas that are frequently immersed/soaked.
The sealing paint applied on this product must form a defect-free continuous coating film.
Construction guidance
Surface treatment:
Before applying fire retardant coating, the dust, oil stains, and debris on the cable surface should be cleaned and polished away, and the fire retardant coating can be applied only after the surface is dry.
Construction :
Use spraying, brushing and other methods, stir well when using, when the coating is slightly thick, dilute with appropriate amount of tap water to facilitate spraying.
During the construction process and before the coating is dry, it should be waterproof, sun-proof, pollution-proof, anti-movement, anti-bending, and repaired in time if damaged .
For wires and cables with plastic or rubber sheath, generally more than 3 coats are directly applied , and the coating thickness is 0.5-1mm.
For insulated cables wrapped with oil paper, a layer of glass cloth should be wrapped first, and then painted. If the construction is carried out outdoors or in a humid environment, a matching topcoat varnish should be added.
Safety measures :
Although this product is a water-based paint, protective measures must be taken to avoid inhaling paint mist and try to keep the paint from coming into contact with the skin and eyes.
Statement :
The information given in this document is believed to be reliable. Each value provided is calculated from the product formulation as theoretical data. If required, we can inform you of the internal common measurement methods used to determine any of the above given data. Since the conditions of use are beyond the control of the manufacturer, the information here is not a guarantee. The products are intended for professional use only. If you have any questions, please contact us. Our company’s technical support and customer service
center is willing to provide you with product consultation and application technology services. You are welcome to contact us by letter or phone.
Range of application
KASTAR 25 Low-VOC Acrylic Water-Based Fireproof Coating is high-performance protection designed for versatile application in various large-scale structural and commercial environments:
Malls-
Airports
Factory-
Industrial Steel Structures
-
Swarehouses
-
Timber structures
Frequently asked questions
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