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Mapei Keracolour GG: A Product Overview
Mapei Keracolour GG is a high-performance, polymer-modified cementitious grout designed for professional use in demanding applications. Specifically engineered for filling wide joints from 4mm to 15mm, it provides a robust, durable finish for a vast range of tile and stone materials. Its advanced formula, consisting of cement, graded aggregates, synthetic resins, and special additives, ensures reliable performance for both interior and exterior floors and walls.
Classified as a CG2WA grout according to EN 13888 standards, Keracolour GG signifies an improved cementitious grout with reduced water absorption and high abrasion resistance. This makes it an ideal solution for areas subject to heavy traffic and moisture, delivering a finish that is not only aesthetically pleasing but also built to last.
Core Features & Specifications
- Wide Joint Capability: Specifically formulated for joints from 4 mm up to 15 mm, providing a strong, stable finish for rustic or large format tiles.
- High Mechanical Strength: Delivers good compressive and flexural strength for a durable, long-lasting grout that resists wear and tear in high-traffic areas.
- CG2WA Classified Performance: Certified to EN 13888 as a CG2WA grout, signifying improved performance with reduced water absorption (W) and high abrasion resistance (A).
- Excellent Durability: Offers good resistance to freeze/thaw cycles, making it a reliable choice for exterior applications like facades, balconies, and terraces.
- Dimensionally Stable: Formulated for low shrinkage to minimise the risk of cracks and fissures, ensuring a seamless and integral finish.
- Versatile Application: Suitable for grouting all types of ceramic and porcelain tiles, terracotta, facebrick, and various stone materials on interior and exterior floors and walls.
The Mapei Keracolour GG Advantage
- Avoid Costly Callbacks: The grout's low shrinkage and high durability mean a crack-free, robust finish that stands the test of time, reducing the risk of rework and enhancing your reputation.
- Achieve a Consistent, Professional Finish: Precision formulation and quality pigments ensure uniform colour, while the smooth consistency allows for complete, void-free joint filling.
- Handle Demanding Environments with Confidence: With reduced water absorption and proven durability, it's the reliable choice for challenging areas like swimming pools, balconies, and high-traffic industrial floors.
- Enhance Performance Further: For the most demanding jobs, Keracolour GG can be mixed with Mapei Fugolastic polymeric additive to achieve superior flexibility and resistance in harsh conditions.
Adheseal tips for using Mapei Keracolour GG
Scenario: Inconsistent Colour or a White Film (Efflorescence)
Potential Outcome: An uneven, blotchy appearance that ruins the final look of the job, leading to client dissatisfaction and potential disputes.
Adheseal Best Practice: Always measure the mixing water precisely, as excess water is a primary cause of efflorescence. Use a clean, rust-free container and clean water. Never add more water once the mix has started to set, as this will compromise the final strength and colour consistency.
Applications in Practice: Trade Scenarios
For Tilers (On-Site Applicator): Commercial Floor Grouting
The Professional's Challenge
Grouting a large format, heavy-traffic commercial floor requires a grout that won't crack under load or wear down from abrasion, and has a workable pot life to cover large areas efficiently.
The Adheseal Solution
Keracolour GG's high compressive strength and abrasion resistance (CG2WA classification) are engineered for these conditions. The approximate 2-hour pot life allows for efficient work on large sections. For easier application on floors, the mix can be made slightly more fluid by adding up to 24% water by weight.
Best Practice Note
After filling the joints, wait 10-20 minutes until the grout becomes opaque before starting the clean-up. Cleaning too soon when the mixture is still plastic will pull grout from the joints and can lead to unevenness.
For Builders (Business Owner): Exterior Facades & Terraces
The Professional's Challenge
Exterior grout is exposed to rain, sun, and freeze/thaw cycles, which can cause cracking, fading, and deterioration over time, leading to costly callbacks and warranty claims.
The Adheseal Solution
Keracolour GG provides good resistance to freeze/thaw cycles and has reduced water absorption, ensuring excellent durability in exposed environments. For maximum performance and longevity on facades, mix with Mapei Fugolastic additive to improve flexibility and adhesion.
Best Practice Note
In hot, dry, or windy climates, it is recommended to lightly wet the joints with clean water a few hours after application. This wet curing process significantly improves the grout's final performance and durability, ensuring a longer service life.
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 FugolasticDownload Mapei Keracolor GG Documents
| Document | Type | Download |
|---|---|---|
| Mapei Keracolor GG Technical Data Sheet | TDS | |
| Mapei Keracolor GG Safety Data Sheet | SDS |
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