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Mapei Keracolor GG: A Product Overview
Eliminate the risk of cracking in wide joints with Mapei Keracolor GG, a high-performance, polymer-modified cementitious grout specifically engineered for joints from 4 mm to 15 mm. Whether you are finishing a rustic terracotta floor or a heavy-duty industrial warehouse, this grout delivers a dense, durable seal that withstands the pressure. Its CG2WA classification ensures reduced water absorption and high abrasion resistance, giving you the confidence that your work will stand up to the elements and heavy foot traffic without costly callbacks.
For tradespeople working on demanding sites like swimming pools or external façades, Keracolor GG provides predictable performance. When mixed with Fugolastic, it gains enhanced flexibility and resistance to harsh conditions, allowing you to deliver a first-time-right finish on every project. Capable DIY users will appreciate the smooth consistency and straightforward application, ensuring a professional, uniform result on balconies, terraces, and interior floors alike.
By choosing Keracolor GG, you are opting for a trade-proven solution that protects your margins through efficiency and reliability. We have the solutions to help you get the job done right, ensuring your reputation remains as solid as your joints.
15mm
Maximum joint width capability with a low-shrinkage formula that prevents fissures and cracking.
Key Features of Mapei Keracolor GG
- Wide Joint Performance: Specifically formulated for joints between 4 mm and 15 mm, ideal for rustic tiles, stone, and facebricks.
- Polymer-Modified Strength: Enhanced with synthetic resins for superior bond strength and resistance to freeze/thaw cycles.
- Low VOC (EC1 Plus): Classified with very low volatile organic compound emissions, ensuring a safer environment for both installers and occupants.
- High Abrasion Resistance: Built to endure heavy-duty use in garages and industrial warehouses without wearing down.
- Versatile Mix Ratios: Can be mixed for wall (thicker) or floor (thinner) applications to suit the specific demands of your workspace.
The Mapei Keracolor GG Advantage
- Excellent Cost-Performance Ratio: Deliver a high-end, professional finish while protecting your project margins.
- Zero Callbacks: The low-shrinkage formula ensures an absence of cracks and fissures, keeping your clients satisfied long after the job is finished.
- System Compatibility: Seamlessly integrates with Mapei Fugolastic to achieve high-performance results in swimming pools and on external façades.
- Supportive Guidance: Easy-to-follow mixing and cleaning protocols help you achieve a uniform colour and professional finish every time.
Adheseal tips for using Mapei Keracolor GG
Scenario: Surface Efflorescence and Whitish Coating
Potential Outcome: Excessive water in the mix can lead to calcium carbonate formation, appearing as a white haze that ruins the final aesthetics.
Adheseal Best Practice: Precisely measure your mixing water (18–20% for walls; approx. 24% for floors). Never add water to a mixture that has already begun to set. Ensuring the substrate is completely dry and protected from rising damp will stop efflorescence before it starts, delivering a clean, predictable performance.
Applications in Practice: Trade Scenarios
For Tilers: Rustic Stone and Terracotta Flooring
The Professional's Challenge
Grouting wide, irregular joints in natural stone or rustic tiles often leads to shrinkage cracks and difficulty in cleaning residue from porous surfaces.
The Adheseal Solution
Keracolor GG is designed for joint widths up to 15 mm, using graded aggregates that fill deep joints without slump. For porous stone, pre-wetting the joints and using a damp cellulose sponge diagonally across the tiles prevents the grout from being pulled out of the joints. Success means a solid, uniform joint that highlights the tile's character with zero rework.
Best Practice Note
In hot or windy climates, wet cure the joints after a few hours. This simple step significantly improves the final mechanical strength and colour uniformity.
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.
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