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Mapei Keracolor FF Bioblock is an improved cementitious grout engineered for internal and external floor and wall tiling in high-moisture environments. This polymer-modified mortar integrates BioBlock technology to actively inhibit microbial growth at the surface while DropEffect creates a hydrophobic finish that beads water and resists grime.
Classified as CG2WA under ISO 13007-3, the formula delivers high abrasion resistance and minimal water absorption for joints up to 6mm. To eliminate the risk of efflorescence or colour shading, installers must ensure precise water-to-powder ratios and verify that the tile adhesive is fully cured and the substrate is dry before grouting.
The use of very fine-graded aggregates ensures that delicate surfaces like polished porcelain or marble are protected from scratching during application. For harsh conditions or submerged swimming pool environments, mixing with Fugolastic resin additive further enhances flexural strength and bond durability.
Frequently Asked Questions
Is Mapei Keracolor FF compliant with Australian standards for swimming pools?
Yes, Mapei Keracolor FF is classified as CG2WA under AS ISO 13007-3, making it an improved cementitious grout with high abrasion resistance and reduced water absorption. For swimming pool applications, it is recommended to mix the grout with Fugolastic to enhance durability and chemical resistance. This ensures your pool joints remain intact and vibrant even under constant water immersion.
How long do I need to wait before walking on floors grouted with Keracolor FF?
Floors are ready for light foot traffic after approximately 24 hours when cured at standard temperatures (23°C). The grout reaches full readiness for heavy use after 3 days, and if the area is to be immersed in water (such as a swimming pool), you must wait a minimum of 7 days. This predictable performance allows you to schedule handovers with confidence.
Can I use Keracolor FF on wide joints in outdoor pavers?
Keracolor FF is specifically designed for joints up to 6 mm wide. For wider joints typically found in large outdoor pavers, this product may experience excessive shrinkage. For joints exceeding 6 mm, a coarser grout specifically formulated for wide joints should be used to prevent cracking and ensure structural integrity. Always check your joint width before starting to avoid rework.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Swimming Pools & Spas | Water-repellent DropEffect® reduces dirtiness and increases durability. | Tilers, Pool Builders |
| Bathroom Wall & Floor Tiling | BioBlock® technology prevents mould growth in high-moisture joints. | Tilers, Bathroom Renovators |
| Polished Porcelain & Natural Stone | Fine-graded aggregates ensure a smooth finish without scratching surfaces. | Tilers, Stone Masons |
| Commercial Garages & Warehouses | High abrasion resistance (CG2WA) stands up to heavy traffic. | Commercial Tilers, Builders |
Applying Mapei Keracolor FF: Enhanced Protocols & Best Practices
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Preparation & Mixing
Achieve a smooth, lump-free paste for consistent colour and strength.
Mixing Ratio
Pour Keracolor FF into a clean container with 25-29% clean water (by weight). Use a low-speed mixer to prevent air bubbles.
Timing: Let the mix stand for 2-3 minutes, then re-stir briefly. Pot life is approx. 2 hours.Pro Tip: Never add extra water once the mixture begins to set; this will weaken the grout and cause colour variation. -
Grouting & Finishing
Fill joints completely to ensure no voids or weak points remain.
Application
Use a MAPEI float or rubber squeegee to pack the grout into the joints diagonally. Remove excess immediately while fresh.
Pro Tip: Clean with a damp sponge only after the grout has turned matt (10-20 mins). If a hazy residue remains after drying, use a clean dry cloth or UltraCare Keranet once fully cured.
Limitations & Safety
Product Limitations
Not suitable for movement or expansion joints. Always use a flexible sealant such as Mapesil AC.
For joints wider than 6 mm, Keracolor FF is not recommended due to shrinkage risk.
Where high acid resistance (pH < 3) or sterile conditions are required, use an epoxy grout from the Kerapoxy range.
Safety & Handling Requirements
Personal Protective Equipment
Wear protective gloves (nitrile or rubber), safety glasses, and protective clothing to prevent skin and eye irritation. Use a dust mask when mixing to avoid inhaling respirable crystalline silica.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes. Remove contact lenses if easy to do. Continue rinsing and seek medical attention.
Skin:
Wash with plenty of soap and water. If irritation or rash occurs, seek medical advice.
Swallowed:
Do not induce vomiting. Seek medical attention immediately and show the SDS.
Mapei Keracolor FF Application Guide
Ceramic, Porcelain & Natural Stone Tiles
Surface Preparation
Before grouting, ensure the tile adhesive has completely hardened (typically 24 hours for normal setting, 3-4 hours for fast setting). Joints must be clean, free of dust, and raked back to at least 2/3 of the tile thickness. For very porous tiles in hot or windy weather, pre-wet the joints with clean water.
Additive Requirements
Additive recommended for harsh conditions
For swimming pools, façades, or heavy traffic floors, replace mix water with Fugolastic synthetic resin to improve adhesion and durability.
MAPEI FugolasticDownloads & technical resources
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