Concrete acid stains create color by reacting chemically with the calcium in concrete rather than using pigments. Because the color results from this reaction, they are not true paints. The final color varies depending on the concrete’s type, quality, and cement content — higher-grade concrete yields deeper, richer tones.
Concrete acid stains create color by reacting chemically with the calcium in concrete rather than using pigments. Because the color results from this reaction, they are not true paints. The final color varies depending on the concrete’s type, quality, and cement content — higher-grade concrete yields deeper, richer tones.
Applicable on old concrete surfaces . Being water based with no petroleum solvents.
Create self-cleaning properties
Applicable on old concrete surfaces
Being water based with no petroleum solvents
Permeability and join to the concrete texture
High UV resistance
Creates a beautiful and varied look for residential and non-residential projects
Staining concrete surfaces
Creating decorative concrete floors
Creating different designs on concrete floors
Painting of concrete parts and products
Painting fountains made of cement mortar
Painting of prefabricated concrete walls
Staining concrete surfaces
Creating decorative concrete floors
Higher concrete grade or more cement amount available on concrete surface will lead to higher paintability rate. For this reason, the final color of the acid stain is determined after its reaction with the concrete surface.
This product can be applied to the surface with a low-pressure pump (all-plastic spraying pump) or a brush. (For more information, refer to this product manual file.)
Keep in a sealed container, dry and low light environment at a temperature of 15-40 degrees Celsius. In case of contact with skin, wash immediately with plenty of water. Immediately see a doctor if swallowed. This solution is free of hazardous evaporative and non-flammable materials. Due to the acidity of this product and reaction with metals, it should not be stored in iron, aluminum, copper, brass, zinc or galvanized containers.
Concrete stain colors are provided in 1 and 5 kg plastic gallons. These materials must be kept in the sealed containers.
High stability and very durable
Create vibrant colors and natural effects
Non-flammable
Painting mortar walls
Due to the acidity of this product, all-plastic equipment must be used to move,
maintain and spray it on the surface.
To apply acid stain on concrete, it must have passed 7 days since the concrete
was applied and the concrete has reached its initial strength.
It is better to apply a clear polymer or protective silicate coating on concrete
surfaces where acid stain is applied.
Physical State
liquid
PH
2to4
Density
1.2g/cm³
Solvent type
Water based
Based purity
Above 98%
Physical appearance
|
liquid
PH
|
2to4
Density
|
1.2 g/cm3
Solvent type
|
Water based
Based Purity
|
Above 98%
Frequently asked
questions
Find clear answers to common questions about application, performance, and technical details so you can choose with confidence.
COUPCOLOR® CAS is a penetrating color liquid designed for staining all types of concrete surfaces, both old and new. It reacts with the surface to provide a long-lasting color while being fully absorbent. Key properties include a liquid appearance, ≥ 98% purity, a pH of 2–3, and a density of 1.2 g/cm³. It is highly stable under normal conditions and resistant to UV light.
Due to the acidic nature of this product, it is necessary to wear chemical safety goggles, body protective clothing, chemical-resistant gloves, and rubber boots. All-plastic equipment should be used for handling, storage, and application. Avoid direct contact with skin, eyes, and inhalation of spray mist.
Eye contact: Rinse eyes with plenty of water for at least 15 minutes and seek medical attention.
Skin contact: Wash immediately with plenty of water, remove contaminated clothing, and get medical care.
Inhalation: Move to fresh air; if not breathing, give artificial respiration and seek medical care.
Ingestion: Do not induce vomiting; seek urgent medical attention.
The product is non-flammable but should be stored away from metals like iron, aluminum, copper, brass, zinc, or galvanized containers due to possible reactions.
COUPCOLOR® CAS is a professional concrete acid stain solution designed to create unique decorative effects and permanent colors on concrete surfaces.
Unlike traditional concrete paints that create a layer on the surface, this acid stain penetrates into the concrete structure and reacts with the minerals inside the substrate to produce natural color variations.
This technology makes COUPCOLOR® CAS an ideal solution for architects, contractors, and designers who want to achieve decorative concrete finishes with long-lasting color stability.
A concrete acid stain is a reactive coloring solution used to transform the appearance of concrete surfaces.
The acid stain works through a chemical reaction between the staining solution and minerals inside the concrete. This reaction creates translucent color effects that become part of the concrete surface rather than forming a separate coating layer.
Concrete acid staining is widely used for:
COUPCOLOR® CAS uses acid-based technology to penetrate concrete surfaces.
The application process includes:
The final appearance depends on the concrete composition, surface texture, and application method, creating a natural and decorative finish.
Unlike surface paints, a concrete acid stain becomes chemically integrated with the concrete surface, creating durable color effects.
Each concrete surface creates its own natural pattern and color variation, providing a distinctive architectural finish.
COUPCOLOR® CAS provides long-lasting decorative effects suitable for areas exposed to daily use.
This concrete staining solution can be used for different architectural surfaces including floors, walls, and decorative concrete structures.
The stain enhances the natural appearance of concrete while maintaining the original texture of the surface.
Concrete acid stain is widely used for creating premium decorative floors in:
COUPCOLOR® CAS provides a durable coloring solution for concrete surfaces requiring both aesthetics and performance.
Suitable for designers and architects looking for natural stone-like effects on concrete.
Can be used for decorative applications on:
| Concrete Acid Stain | Concrete Paint |
|---|---|
| Chemical reaction with concrete | Surface coating layer |
| Natural color variation | Uniform color |
| Penetrates into concrete | Sits on surface |
| Long-lasting decorative effect | May require maintenance |
| Maintains concrete texture | Covers original texture |
COUPCOLOR® CAS provides:
✔ Professional concrete acid staining technology
✔ Natural decorative color effects
✔ Strong adhesion with concrete surfaces
✔ Suitable for architectural applications
✔ Long-lasting performance
✔ Unique appearance on every surface
Before applying COUPCOLOR® CAS:
Remove dust, oil, dirt, and any contaminants from the concrete surface.
Apply the concrete acid stain evenly using suitable application equipment.
Allow sufficient time for the chemical reaction between the stain and concrete minerals.
Clean the surface according to application requirements.
Apply a suitable concrete sealer to improve durability and protect the final appearance.
| Property | Description |
|---|---|
| Product Name | COUPCOLOR® CAS |
| Product Type | Concrete Acid Stain |
| Application | Decorative Concrete Coloring |
| Usage | Interior & Exterior Concrete Surfaces |
| Function | Permanent Concrete Color Transformation |
Concrete acid stain is a reactive coloring solution that changes the color of concrete through a chemical reaction with minerals inside the surface.
Unlike paint coatings, concrete acid stains penetrate into the surface and do not create a separate film layer.
It can be applied on decorative concrete floors, walls, commercial spaces, and architectural concrete surfaces.
The durability depends on surface preparation, application quality, and protective sealing.