Mapei Mapegrout T40 is a high-performance, shrinkage-compensated, thixotropic repair mortar designed for vertical and overhead concrete repair applications. This cement-based mortar delivers rapid strength gain—achieving 75 MPa compressive strength in 28 days—and is suitable for both structural and cosmetic repairs. It’s certified for potable water contact, making it ideal for water tanks, treatment plants, and infrastructure projects. Its thixotropic nature ensures no slump on application surfaces, even without formwork.
Primer Information: For reinforcing bar protection, apply Mapefer or Mapefer 1K prior to use. This ensures long-term corrosion resistance in coastal and structural environments.
Cure Time: Initial set within 1 day and full cure in 28 days. Fast-setting nature allows rapid turnaround for urgent structural repairs and recoating.
Coverage Rate: Each 25 kg bag yields approximately 13.3 litres of mortar—ideal for patch repairs and high-volume projects with reduced waste.
Application Temperature Range: 5°C to 35°C (41°F to 95°F), ideal for Australian site conditions across all seasons.
Chemical Properties: Composed of Portland cement, graded aggregates, fibre reinforcement and chemical additives. Fully complies with EN 1504-3 Class R3 and AS/NZS 4020 for potable water contact.
Q: Can I apply Mapegrout T40 to overhead surfaces without formwork?
A: Yes. Mapegrout T40 is thixotropic, meaning it holds its shape when applied vertically or overhead, making it ideal for soffit and beam repairs without needing formwork.
Q: Is it safe to use in potable water tanks?
A: Yes. Mapegrout T40 complies with AS/NZS 4020:2005, which makes it suitable for contact with drinking water infrastructure such as tanks, reservoirs, and pipes.
Q: What surface preparation is required?
A: The substrate must be clean, sound, and saturated-surface-dry (SSD). Remove any loose materials and contaminants. Steel reinforcement should be primed with Mapefer or Mapefer 1K.
Q: Can I add extra water to increase flow?
A: No. Adding excess water compromises the strength and durability of the mortar. Always follow the mixing ratio of 3.8 to 4.1 litres per 25 kg bag.
Q: How thick can I apply it in one pass?
A: Mapegrout T40 can be applied up to 40 mm thick in a single layer. For thicker applications, build up in layers, allowing proper curing between coats.