Exclusive partner of the Reincke Naturfarben GmbH plant in India



Discover the unparalleled preparation capabilities of our Silicate Primer 621, specially formulated for highly absorbent surfaces like walls and ceilings. This primer is the best choice for those looking to achieve a flawless finish with silicate paint or plaster, providing an ideal foundation that enhances both the appearance and longevity of your paint job.

🌱 Best Primer for Interior Walls: Silicate Primer 621 stands as the best primer for interior walls due to its exceptional ability to prepare surfaces for painting or plastering. It ensures that silicate paint adheres properly, providing a smooth, even finish that lasts.

🔍 What Is the Best Primer for Interior Walls?: If you’re asking this question, Silicate Primer 621 is your answer. It’s specifically designed to work with highly absorbent materials, making it an essential first step in any interior painting project. It’s renowned for enhancing paint adhesion and color consistency.

🖌️ Optimal Surface Preparation: This primer not only preps your walls but also seals them, reducing the absorbency and increasing the yield of your paint. It’s the best foundation you can provide for your high-quality silicate paints, ensuring maximum coverage and minimal paint waste.

💨 Highly Permeable: Silicate Primer 621 is a breathable primer that maintains the natural vapor permeability of your walls. This is crucial for maintaining air quality and preventing issues related to moisture, such as mold and mildew growth.

🌍 Eco-Friendly and Safe: In line with LEINOS’s commitment to sustainability, this primer is free from solvents and other harmful chemicals, making it safe for use in homes and environments where health is a priority.

Choose Silicate Primer 621 for your next interior painting project and experience why it is considered the best primer for walls and ceilings. Ensure your painting foundation is as robust as it is beautiful with this superior product.


– Water
– potassium silicate (liquid potassium glass)
– organic binder

Does not contain acrylate. The maximum content of Volatile Organic Compounds (VOC) in this product is 1 g/l. European standard VOC no more than 30 g/l (Category A since 2010).

1 l

20 m2

2.5 l

50 m2

10 l

200 m2

Standard scheme

Apply with a brush. The temperature of the premises and the treated surface must be at least 12 °C. Application: 1 or 2 coats depending on the color of the base and the color of the paint. Always do a trial coloring.



Spray gun


The surface must be dry, durable, clean, free of grease and dust. The air and surface temperature is above 15 °C. Depending on the strength and absorbency of the surface, the product can be diluted with water up to 1:3.

Carefully read the technical instructions of each composition used

At 20 ° C and 50% relative humidity for about 1-3 hours. To dry the composition and avoid the formation of a specific odor, it is recommended to ventilate the room and use forced ventilation.

A sufficient amount of oxygen in the air is needed to dry the composition.

Regularly ventilate the room well. In order to avoid the formation of a specific odor, it is recommended to use sources of constantly circulating air, for example, fans.

Immediately after work, use water and natural soap LEINOS art. 930 to clean the tool.

Keep out of reach of children

Avoid contact with the environment.

Residues should not be disposed of in the soil or sewage. Dispose of the contents/container for appropriate recycling.

It is an alkaline product. Protect your eyes and skin from splashes.

Ensure proper protection of surfaces that should not be covered with paint.

Any droplets that hit the surrounding surfaces should be immediately washed off with plenty of water.

Store in a cool, dry place, do not freeze. Shelf life in a closed package is 12 months.

According to the official rules. Disposal Code: EAK/EWC 08 01 03 Dry product residues can be disposed of as household waste


Scroll to Top