Mapegrout Fast-Set Rapido is a fibre-reinforced, controlled-shrinkage concrete repair mortar made for urgent localised reinstatement. It sets quickly while its thixotropic consistency helps installers shape repairs on suitable concrete faces without the material flowing away.
A damaged balcony edge, column corner or beam face may need to be rebuilt before other work can proceed. Fast-Set Rapido gives repair teams a short-setting mortar intended for these prepared defects, helping a repair programme move ahead where a longer-setting mortar would delay subsequent work. It is particularly useful on manageable localised areas that can be placed immediately after mixing.
MAPEI specifies a very short working window of around 10 minutes and a typical 20–25 mm maximum thickness per layer, with rapid setting under standard conditions. That speed is an advantage only when the substrate, tools and labour are ready. For less time-critical profile rebuilding, consider Mapegrout T40.
Remove defective concrete, prepare exposed reinforcement and pre-wet the substrate as specified. Mix in small quantities, respect layer thickness and curing, and assess structural defects before attempting repairs.
How quickly does Mapegrout Fast-Set set?
It sets in about 30 to 40 minutes at 20°C and is ready for service within a few hours.
What repair class does it meet?
It is an EN 1504-3 Class R3 structural repair mortar.
How thick can it be applied?
About 20 to 25mm per layer.
How long is the pot life?
Approximately 10 minutes at 20°C.
| Property | Value |
|---|---|
| Material Type | PCC (Portland Cement-based Compound) |
| Density | 2150 kg/m³ |
| Consistency | Powder, thixotropic when mixed |
| Compressive Strength | 3 hrs >10 MPa, 1 day >20 MPa, 7 days >28 MPa, 28 days >40 MPa |
| Flexural Strength | 3 hrs >4.0 MPa, 28 days >8.0 MPa |
| Bond Strength | >1.5 MPa |
| Modulus | 24 GPa |
| Pot Life | ≈ 10 minutes at 20 °C |
| Initial Set Time | < 30 minutes |
| Service Temperature | Freeze-thaw with de-icing salts >1.5 MPa |
| Mixing Ratio | 100 parts product : 15–16 parts water (by weight) |
| Coverage Rate | 18 kg/m² per cm thickness |
| Application Thickness | 20–25 mm per layer |
| Classification | EN 1504-3 R3 |
| Storage Life | 12 months in unopened packaging at +5 °C to +35 °C |
| Composition | 100 kg of Mapegrout Fast-Set; 15-16 kg of water |
| Thickness | 20-25 mm |
| Application Temperature | Environmental and substrate temperature from +5°C to +35°C |
| Recoat Time | approx. 15 mins. |
| Full Cure | 2 – 3 hours |
| Set Time | < 30 mins. |
Here are some common examples on where Mapegrout Fast-Set Rapido used by our customers.
