For interior and exterior floor slabs where rapid drying is required to lay timber, vinyl, carpet, or stone coverings without long curing delays, Mapecem Pronto is a pre-blended, ready-to-use mortar that controls shrinkage and dries in 24 hours. It provides a fast-track screeding method for new concrete slabs, repairs in high-traffic commercial zones like supermarkets and hospitals, and screeds incorporating underfloor heating systems.
Mapecem Pronto eliminates the risk of weak screeds caused by incorrect on-site sand grading or binder dosage errors. Because it is pre-blended, you only mix it with water to achieve high mechanical strength, reaching a compressive strength of over 40 N/mm² in 1 day and over 62 N/mm² after 28 days. Its rapid hydration chemistry binds mixing water internally, allowing the screed to dry to less than 2% residual moisture within 24 hours so you can lay moisture-sensitive resilient floor coverings, PVC, linoleum, and wood safely. It achieves a CT - C60 - F10 - A1FL classification under European Standard EN 13813, verifying its high compressive and flexural strength profile.
Mapecem Pronto is suitable for three distinct installation types on concrete substrates and floor slabs:
Mix one 20 kg bag of Mapecem Pronto with 1.5 to 1.7 litres of water for 3 to 4 minutes using a paddle mixer, drum mixer, or forced action mixer. Do not modify the water ratio under any circumstances, as this will compromise the final performance. Spread, tamp, and float the mix immediately; each batch must be fully placed and finished within 30 minutes of mixing. When work is interrupted, cut the screed vertically and insert 3 mm to 6 mm diameter, 20 cm to 30 cm long steel dowels spaced at 20 cm to 30 cm to tie the construction joints and prevent cracking.
Tiles can be laid on Mapecem Pronto after 3–4 hours. For moisture-sensitive floor coverings such as timber or vinyl, the screed is ready after 24 hours with low residual moisture.
Mapecem Pronto achieves over 40 N/mm² in compressive strength after one day and over 50 N/mm² after three days. This meets the EN 13813 CT-C60-F10-A1FL classification.
Yes, Mapecem Pronto is suitable for screeds incorporating underfloor heating systems. It provides reliable performance without requiring additional plasticisers.
| Application | Key benefit | Primary trades |
|---|---|---|
| Fast-track bonded, unbonded, and floating screeds | Ready for light foot traffic in 2–3 hours. Allows project acceleration with predictable drying performance. | Builders, flooring contractors, screeders |
| Ceramic and natural stone installations | Allows tile and stone installation after 3–4 hours. Reduces project delays for quicker completion. | Tilers, builders |
| Timber, PVC, linoleum, and other moisture-sensitive floor coverings | Achieves residual moisture below 2% after 24 hours. Minimises the risk of flooring failures and costly callbacks. | Flooring contractors, builders |
| Repairs in continuous-traffic areas (e.g., hospitals, airports) | High early strength and rapid drying. Reduces downtime and gets critical spaces back into service quickly. | Remedial contractors, commercial flooring crews |
| Screeds incorporating underfloor heating systems | Suitable for heated screeds without additional plasticisers. Provides a simpler, reliable system. | Builders, screeders, HVAC installers |
| Projects requiring consistent screed quality | Pre-blended formulation removes batching guesswork. Delivers consistent strength and drying for a reliable finish. | All trades, project managers |
Mix 20 kg with 1.5–1.7 L water for 3–4 minutes.
Place, compact, and float immediately to achieve a smooth surface.
Wear gloves, eye protection, and a dust mask when handling the powder to prevent exposure.
Use in well-ventilated areas to minimise dust inhalation during mixing and application.
Correct surface preparation ensures optimal adhesion and screed performance, preventing costly failures.
Surface prep: Ensure the substrate is clean, dry, and free from oil, grease, dust, or loose material. Any existing movement joints must be carried through the new screed layer.
Primer: Required for bonded screeds. Use a bonding slurry, such as Mapei Planicrete SP, applied fresh-on-fresh for secure adhesion.
| Property | Value |
|---|---|
| Consistency | Powder |
| Colour | Grey |
| Bulk Density | 1800 kg/m³ |
| Mixing Ratio | 1.5–1.7 L water per 20 kg |
| Pot Life | 20–30 minutes |
| Application Temperature | +5°C to +35°C |
| Foot Traffic | 2–3 hours |
| Ready For Use | 24 hours |
| Residual Moisture | < 2% after 24 hours |
| Compressive Strength | > 40 N/mm² (1 day), > 50 N/mm² (3 days) |
| Flexural Strength | > 6 N/mm² (1 day), > 7 N/mm² (3 days) |
| Consumption | 20 kg/m² per cm thickness |
Here are some common examples on where Mapei Mapecemp Pronto Screed used by our customers.
