Mapei Topcem - Hydraulic Binder for Screeds

Fast-Setting Hydraulic Binder for Screeds Ready for Flooring in 24 Hours

Mapei Topcem is a special hydraulic binder formulated for the preparation of fast-drying, shrinkage-compensated screeds. When mixed with aggregate and water on site, Topcem produces screeds that are ready to receive flooring in as little as 24 hours (ceramics) and 4 days (resilient or wood flooring). Ideal for both bonded and unbonded screeds, Topcem is the perfect solution where time-sensitive floor installations are required in residential, commercial, or industrial settings.

Key Features & Benefits

• Rapid Drying: Allows ceramic flooring after 24 hours and wood/resilient flooring after 4 days.
• Shrinkage-Compensated: Reduces the risk of cracking and ensures dimensional stability.
• High Strength: Provides excellent mechanical resistance and surface hardness.
• On-Site Mixing: Simple to use with standard screed sand and water.
• Flexible Application: Suitable for bonded, unbonded, or floating screeds with insulation or underfloor heating systems.

Product Details

• Type: Special hydraulic binder
• Form: Grey powder
• Packaging: 20kg bags
• Mix Ratio: 200–250 kg of Topcem per m³ of aggregate (0–8mm grain size)
• Working Time: Approx. 40–60 minutes at 20°C
• Foot Traffic: After 12 hours
• Flooring Installation: After 24 hours (tiles), 4 days (resilient/wood)
• SKU: TOPCEM20

Application Instructions

1. Substrate Preparation: Ensure the substrate is stable, clean, and free from oil, dust, and loose material.
2. Mixing: Mix Topcem with clean, damp screed-grade sand (0–8mm) and water using a forced-action mixer.
3. Apply Screed: Place, level, and compact the screed as per standard screeding practice.
4. Curing: Protect from rapid drying and cover if exposed to direct sunlight or wind.
5. Flooring Installation: Tiles may be laid after 24 hours; resilient or wood flooring after 4 days.

Limitations

• Do not mix with other binders or cement.
• Not suitable for screeds thinner than 35mm unless bonded.
• Do not apply at temperatures below +5°C or above +35°C.

Health & Safety

Contains cement – avoid contact with skin and eyes. Use gloves, goggles, and a dust mask. Refer to the Safety Data Sheet (SDS) for full health and handling instructions.