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A robust, monolithic bond between your concrete slab and engineered screed is foundational. Debonding, hollow spots, or screed failure starts at the interface. Topcem Pronto Slurry creates that critical, reliable connection. It ensures your Topcem Pronto screed achieves maximum adhesion, wet-on-wet, to the concrete substrate.
Topcem Pronto Slurry is purpose-built as the essential bonding interface for Mapei’s Topcem Pronto engineered screed system. It ensures the screed forms a durable, integrated layer with the concrete substrate. This isn't a general-purpose bonding agent; it’s specifically tuned to work in tandem with Topcem Pronto’s hydration profile, creating a perfect chemical and mechanical bond that prevents the common failures associated with poorly adhered screeds.
Preparation begins with a structurally sound, clean, and completely cured substrate, free of all contaminants. Mix the slurry by gradually adding the powder to the liquid (Planicrete/water or Planicrete SP) in a clean container, blending until homogeneous. Allow it to slake for 3-4 minutes, then briefly remix. Apply the slurry using a large flat brush, scrubbing brush, or a 6x6 mm square-notched trowel to achieve the 2-3 mm layer. The critical step is to apply the Topcem Pronto screed immediately, while the slurry is still fresh. Tools clean easily with water before the product sets.
Topcem Pronto Slurry delivers reliable performance for bonded Topcem Pronto engineered screeds across a range of demanding conditions. It is suitable for both indoor and outdoor applications where screed integrity and adhesion to the concrete substrate are paramount. This includes commercial flooring installations, high-traffic areas, and any project where the performance of the screed system cannot be compromised.
This slurry is the first critical step in the Mapei Topcem Pronto engineered screed system. It acts as the indispensable bonding bridge, applied directly to the concrete slab before the Topcem Pronto screed. Its role is to prepare the substrate, creating a chemical and mechanical key that ensures the screed adheres properly and performs as a durable, load-bearing layer. Without this specialised slurry, the Topcem Pronto screed would not achieve its designed bond strength and long-term stability.
Apply Mapei Topcem Pronto Slurry as a 2–3 mm wet-on-wet bonding layer. Install the screed while the slurry is still fresh to ensure full adhesion and prevent delamination.
Yes, Topcem Pronto Slurry is suitable for both indoor and outdoor applications. It provides reliable bonding across different environmental conditions when applied to a properly prepared substrate.
If Topcem Pronto Slurry dries before screed application, the bonding performance will be compromised. Always apply the screed wet-on-wet to ensure the bond forms correctly and to avoid rework.
Substrates must be clean, dry, structurally sound, and free from contaminants like oil or curing compounds. Ensure compliance with current Australian Standards to achieve proper adhesion.
| Application | Key benefit | Primary trades |
|---|---|---|
| Bonding screeds to concrete slabs | Ensures full adhesion and prevents screed delamination, even under heavy loads. | Floor preparation contractors, Tilers |
| Screed bonding in internal and external areas | Provides reliable performance across varied environmental conditions, maintaining bond integrity. | Builders, Landscapers |
| Critical bond for tiled floor systems | Creates a stable, integral base for subsequent tiling, reducing risk of tile failure due to screed movement. | Tilers, Specifiers |
Prepare substrate to ensure strong adhesion and compliance.
Wear appropriate gloves and eye protection to prevent skin and eye contact during handling and application.
Ensure adequate ventilation in the work area during application to minimise exposure.
Store in original sealed packaging in a cool, dry place. Product has a shelf life of 12 months. Dispose of contents and container according to local regulations.
Correct substrate preparation is critical for Mapei Topcem Pronto Slurry to form a lasting bond and prevent screed delamination.
Surface prep: Ensure the surface is structurally sound, clean, and dry. Remove all contaminants such as oil, grease, or curing compounds. Mechanically prepare the concrete using grinding or shot blasting until a sound, open surface is achieved.
Primer: Not required. Ensure the substrate complies with Australian Standards and has no signs of rising damp before applying the slurry.
| Property | Value |
|---|---|
| Base Chemistry | Cementitious slurry |
| Application Thickness | 2–3 mm |
| Coverage Rate | 2–2.5 kg/m² |
| Application Temperature | +5°C to +35°C |
| Packaging | 20 kg bags |
| Shelf Life | 12 months |
Here are some common examples on where Mapei Topcem Pronto Slurry used by our customers.
Civil Construction
Rapid restoration of deteriorated concrete structures, like beams or balconies, requiring quick strength and stability.
Achieves high compressive and flexural strength rapidly, meeting R3 structural standards, ensuring durable repairs on critical elements.
Flooring
Repairing damaged sections of industrial concrete flooring where operations demand minimal downtime for traffic.
Allows light traffic within 3 hours, offering fast return to service and high wear resistance for demanding industrial environments.
Civil Construction
Assembling new concrete pipes or repairing damaged edges and joints in critical underground infrastructure.
Provides excellent impermeability and strong adhesion to concrete, creating robust, watertight seals essential for pipe integrity.
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