Bostik MC250 Vitri-Flex Tile Adhesive - Grey - 20kg
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Product Information
Full details
The Bostik MC250 Vitri-Flex Rapid Set Flexible Wall & Floor Tile Adhesive is designed for professional tilers and demanding projects requiring accelerated installation. Its key benefit is the rapid-setting formulation, allowing grouting in as little as 2-3 hours, significantly reducing project timelines. A potential caveat is that while versatile, users should always verify substrate suitability for optimal performance.
All features
| Colour | Grey |
|---|---|
| Model Part Number | 30811607 |
| Brand | Bostik |
Extended Product Information
FAQs
How long does it take to grout after using Bostik MC250?
You can typically grout approximately 2 to 3 hours after fixing the tiles, depending on ambient conditions.
Can I use this adhesive in a shower?
Yes, the Bostik MC250 Vitri-Flex is suitable for permanently wet areas such as showers.
Do I need to add anything for flexible floors?
No, this adhesive is formulated with inherent flexibility and requires only water for mixing; no additional flexible additives are needed.
What types of tiles can I use with this adhesive?
It is suitable for ceramic, quarry, porcelain, vitrified tiles, and natural stone.
What substrates is this adhesive compatible with?
It bonds to concrete, plaster, sand/cement render, screeds, blockwork, brickwork, glazed surfaces, vinyl tiles, and plywood overlay.
Is this adhesive suitable for exterior use?
Yes, it is suitable for interior and exterior applications.
What is the coverage rate?
Coverage varies depending on tile size and trowel used. Refer to the product packaging for specific coverage guidelines.
How should I store the unused adhesive?
Store unused adhesive in a cool, dry place in its original, tightly sealed packaging.
Troubleshooting
Adhesive not sticking to the substrate.
Ensure the substrate is properly prepared, clean, dry, and free from dust or contaminants. Verify that the substrate is suitable for tiling and if priming was required and performed correctly.
Tiles are slipping after placement.
Check that the correct amount of adhesive was applied using an appropriate trowel. Ensure tiles were pressed firmly into the adhesive with a twisting motion to achieve full contact. Avoid over-watering the mix.
Grouting lines are uneven or inconsistent.
Ensure consistent tile spacing with spacers. This is more of a tiling technique issue than an adhesive problem, but proper adhesive application supports accurate tile placement.
Adhesive seems too thick or too thin.
Strictly follow the water mixing ratio as specified on the product packaging. Too little water makes it thick and difficult to spread; too much water weakens the bond and delays setting.
Pros and Cons
Pros
- Significantly speeds up project timelines due to rapid setting.
- Eliminates the need for separate flexible additives.
- Suitable for a wide array of tile types and substrates.
- Offers excellent performance in wet areas and with underfloor heating.
- Reduces labor time by allowing faster grouting.
Cons
- The 20kg bag size may be cumbersome for very small jobs.
- Requires careful surface preparation for optimal adhesion.
- Rapid setting nature means less working time for tile placement.
- Specific compatibility with certain natural stones may require testing.
Setup, Compatibility & Care
Setup:
- Ensure the substrate is clean, dry, sound, and free from dust, grease, and other contaminants. Prime porous surfaces if necessary according to substrate manufacturer guidelines.
- Mix the adhesive with clean water (refer to product packaging for precise water ratios) using a mechanical mixer until a smooth, lump-free paste is achieved. Allow the mixture to stand for 5 minutes, then re-mix briefly.
- Apply the adhesive to the substrate using a suitable notched trowel, ensuring even coverage.
- Fix tiles firmly into the adhesive with a slight twisting motion, ensuring full contact.
Compatibility:
- Tiles: Ceramic, quarry, porcelain, vitrified tiles, and natural stone.
- Substrates: Concrete, plaster, sand/cement render, screeds, blockwork, brickwork, glazed surfaces, vinyl tiles, and plywood overlay.
- Environments: Interior and exterior applications, including permanently wet areas (showers), areas with underfloor heating, and areas subject to limited vibration.
Care:
- Store unused adhesive in a cool, dry place, tightly sealed.
- Clean tools and equipment immediately after use with water.
- Excess adhesive should be removed from tile surfaces before it hardens.