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Mapei Keracolor GG is a high-performance, polymer-modified cementitious grout designed for commercial façades, industrial flooring, and large-format tile installations requiring joint widths between 4mm and 15mm.
This CG2WA-classified formula utilizes graded aggregates and synthetic resins to ensure exceptionally low shrinkage and high mechanical strength, eliminating the risk of fissures and hairline cracks in wide-joint exterior surfaces and submerged environments.
When mixed with Fugolastic polymeric additive, the system achieves the enhanced bond strength and reduced water absorption necessary for swimming pools and heavy-traffic warehouses. To prevent efflorescence and ensure colour consistency, contractors must maintain strict water-to-powder ratios and avoid grouting over damp substrates.
Mapei Keracolor GG is certified EC1 Plus for very low VOC emissions and complies with EN 13888 standards for superior abrasion and freeze/thaw cycle resistance.
Frequently Asked Questions
Can Mapei Keracolor GG be used in swimming pools?
Yes, Mapei Keracolor GG is suitable for swimming pools when mixed with Fugolastic instead of water. This combination improves the grout's final characteristics, achieving the resistance necessary for constant water immersion and harsh chemical environments. Basins and pools can typically be filled 7 days after grouting to allow for a full cure.
How long should I wait before walking on a newly grouted floor?
Floors grouted with Mapei Keracolor GG are set for light foot traffic after approximately 24 hours. For heavy traffic or full commercial use, the floor is ready after 3 days. Always ensure the site temperature is between +5°C and +35°C during this period to ensure predictable performance and strength development.
What is the maximum joint width for Keracolor GG?
Mapei Keracolor GG is specifically designed for joint widths ranging from 4 mm to 15 mm. Its formula includes graded aggregates that prevent the shrinkage and cracking often seen when using standard fine grouts in wider gaps. This makes it the ideal choice for rustic tiles, facebricks, and stone materials.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Industrial Flooring (Garages/Warehouses) | High abrasion resistance for heavy traffic | Commercial Builders / Tilers |
| External Façades & Balconies | Freeze/thaw resistance and durability | Tilers / External Contractors |
| Swimming Pools & Tanks | Reduced water absorption (when used with Fugolastic) | Pool Specialists |
| Rustic Residential Floors | Fills joints up to 15mm without cracking | Tilers / Joiners |
Applying Mapei Keracolor GG: Enhanced Protocols & Best Practices
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Mixing
Mix Keracolor GG into a clean container with 18-20% water by weight for walls, or up to 24% for floor applications.
Low-Speed Mechanical Mixing
Use a low-speed mixer to achieve a smooth consistency and avoid air entrapment. Let the mix stand for 2-3 minutes before a brief re-stir.
Timing: Use the mixture within 2 hours of preparation for optimal workability. -
Application & Finishing
Fill joints completely using a Mapei rubber float, ensuring no voids remain.
Diagonal Wiping
Remove excess grout while fresh by moving the float diagonally across the joints. Once the mix becomes opaque (10-20 mins), clean with a damp cellulose sponge.
Pro Tip: For a spotless finish on rustic tiles, use a dry cloth to remove any powdery haze once the grout has set. For stubborn residues, use UltraCare Keranet only after full cure.
Limitations & Safety
Product Limitations
Not recommended for expansion or movement joints; use appropriate flexible Mapei sealants instead.
Do not use where acid resistance or high hygienic standards are required; consider Kerapoxy for these applications.
Avoid mixing different grout colours together to prevent shade inconsistency.
Safety & Handling Requirements
Personal Protective Equipment
Wear protective gloves (polychloroprene or nitrile), safety goggles, and protective clothing. Avoid breathing dust; use respiratory protection if ventilation is insufficient.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Consult an ophthalmologist immediately.
Skin:
Wash with plenty of soap and water. Remove contaminated clothing. Seek medical attention if irritation persists.
Swallowed:
Get medical attention showing the SDS. Do not induce vomiting.
Mapei Keracolor GG Application Guide
Ceramic, Stone, and Terracotta
Surface Preparation
Before grouting, ensure the tile adhesive or mortar has completely hardened. Joints must be clean, free of dust, and emptied to at least 2/3 of the tile thickness. For very porous tiles in high temperatures, pre-wet the joints with clean water to prevent premature drying and ensure a first-time-right bond.
Additive Requirements
Additive recommended for harsh conditions
For façades, swimming pools, or high-traffic industrial floors, replace mixing water with Mapei Fugolastic to enhance flexibility and water resistance.
Mapei Fugolastic| Document | Download |
|---|---|
| Mapei Keracolor GG Technical Data Sheet | |
| Mapei Keracolor GG Safety Data Sheet |
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