Gypsum-based self-leveling compound mortar is a type of flooring underlayment that is used to create smooth and level surfaces in preparation for the installation of floor coverings such as tiles, vinyl, carpet, or hardwood. This mortar is designed to level uneven or sloping substrates and provide a flat and even foundation for the final flooring material. Here are key characteristics and features of gypsum-based self-leveling compound mortar:

1. Composition:

• Gypsum: The main component is gypsum (calcium sulfate) in the form of a powder. Gypsum is mixed with other additives to enhance properties such as flow, setting time, and strength.

2. Properties:

• Self-Leveling: The mortar is formulated to have self-leveling properties, allowing it to flow and settle into a smooth, flat surface without the need for excessive troweling.
• High Fluidity: Gypsum-based self-leveling compounds have high fluidity, enabling them to flow easily and reach into low spots, filling voids and creating a level surface.
• Rapid Setting: Many formulations are designed to set quickly, allowing for a faster overall installation process.

3. Applications:

• Subfloor Preparation: Gypsum-based self-leveling compounds are used to prepare subfloors in residential, commercial, and industrial buildings. They are applied over concrete, plywood, or other substrates.
• Interior Applications: Suitable for interior applications where the conditions are controlled and moisture exposure is limited.

4. Benefits:

• Leveling: The primary benefit is the ability to level uneven or sloping surfaces, providing a smooth and even foundation for subsequent flooring installations.
• Fast Installation: Rapid-setting formulations allow for quick installation and faster progression to the next phase of the construction or renovation project.
• Minimizes Floor Preparation Time: Reduces the need for extensive floor preparation, making it a cost-effective solution.

5. Installation Process:

• Surface Preparation: Clean the substrate thoroughly, removing dust, debris, and contaminants. Repair any cracks or imperfections.
• Priming (if required): Apply a primer to the substrate to improve adhesion and control the absorbency of the surface.
• Mixing: Mix the gypsum-based self-leveling compound according to the manufacturer’s instructions. Ensure a smooth and lump-free consistency.
• Pouring and Spreading: Pour the mixed compound onto the substrate and spread it evenly using a gauge rake or similar tool. The self-leveling properties will help distribute the compound uniformly.
• Deaeration: Use a spiked roller to remove air bubbles and ensure a smooth surface.
• Setting and Curing: Allow the compound to set and cure according to the specified time provided by the manufacturer.

6. Considerations:

• Moisture Sensitivity: Gypsum-based compounds are sensitive to moisture, so they may not be suitable for areas with prolonged exposure to water.
• Thickness Limitations: Some formulations may have thickness limitations, and additional layers may be required for thicker applications.
• Compatibility with Floor Coverings: Ensure compatibility with the specific type of floor covering that will be installed over the self-leveling compound.

Gypsum-based self-leveling compound mortar is a versatile solution for achieving level and smooth subfloors in various applications. However, it’s important to carefully follow the manufacturer’s guidelines and recommendations for proper installation and to consider the specific requirements of the flooring system that will be applied over the compound.