Big on Building's 25kg Bonding Coat Plaster is a versatile undercoat plaster designed for application on smooth or low-suction backgrounds, providing an ideal base for finishing plasters.

Key Features:

• Versatile Application: Suitable for various backgrounds, including concrete, plasterboard, and surfaces treated with bonding agents, ensuring compatibility across different substrates.
• Enhanced Workability: The fine mix offers excellent workability, making it easier to spread, rule, and darby, resulting in a smooth and level base coat.
• Optimal Thickness: Designed for application at a thickness of approximately 11mm, providing adequate coverage and support for finishing layers.
• Efficient Setting Time: With a setting time of around 1.5 to 2 hours, it allows for timely progression to finishing coats, enhancing project efficiency.
  
  

Applications:

• Undercoat Plaster: Ideal for use as a base coat on low-suction surfaces, preparing them for the application of finishing plasters.
• Surface Preparation: Suitable for leveling and smoothing uneven backgrounds, ensuring a uniform surface for subsequent decorative finishes.
  
  

Application Guidelines:

1. Surface Preparation: Ensure the background is clean, dry, and free from dust or contaminants. Pre-treatment may be required for certain surfaces to enhance adhesion.
2. Mixing: Add the plaster to clean water and mix until a smooth, lump-free consistency is achieved.
3. Application: Apply the plaster with firm pressure to the prepared surface, building up to the required thickness of approximately 11mm.
4. Finishing: Once the plaster has set sufficiently, lightly scratch the surface to provide a key for the finishing plaster.
   
   

Technical Specifications:

• Coverage: Approximately 2.75m² per 25kg bag at 11mm thickness.
• Setting Time: 1.5 to 2 hours.
• Compliance: Conforms to EN 13279-1 standards for gypsum plasters.
  
  

For a reliable and efficient undercoat plaster that ensures a solid foundation for your finishing layers, choose Big on Building's 25kg Bonding Coat Plaster, designed to deliver exceptional performance on a variety of backgrounds.