Bostik Cempolay Ultra Strong Smoothing Compound - 20kg

Smooth and level sub floors before laying decorative floor coverings with Bostik Cempolay Ultra St...

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Product Information

Full details

This guide is designed for both DIY enthusiasts and professional contractors needing to level subfloors before installing new flooring. The Bostik Cempolay Ultra Strong Smoothing Compound provides a fast-setting, durable solution, allowing foot traffic in just two hours and suitable for both interior and exterior applications. However, proper surface preparation and adherence to the specified application thickness are crucial for optimal performance.

All features

Model Part Number5010591013360
BrandBostik

Extended Product Information

FAQs

How much area does a 20kg bag cover?

A 20kg bag covers approximately 8m² at a 2mm thickness.

How long does it take for the compound to dry?

Foot traffic is possible in as little as 2 hours (at 20°C). Drying time depends on thickness, with greater than 3mm taking around 2-3 hours.

Can I use this product outdoors?

Yes, it is suitable for exterior applications and is water and frost resistant.

What surfaces can I apply this to?

It is suitable for concrete and sand/cement screeds.

Do I need to prime the surface?

Yes, it is recommended to prime the surface before applying the compound for optimal adhesion.

Can I use it in a garage?

Yes, it can be used on domestic garage floors before overcoating with a suitable floor paint.

What is the maximum thickness I can apply?

The compound can be applied up to 20mm thick.

Troubleshooting

Compound not leveling properly.

Ensure the subfloor is properly primed and the compound is mixed to the correct consistency. Use a gauge rake or trowel to achieve even distribution.

Compound cracking after drying.

Ensure the compound has been applied within the recommended thickness range. Excessive thickness can lead to cracking. Ensure the subfloor is dry before application.

Slow drying time.

Check the ambient temperature and humidity. Lower temperatures and higher humidity can slow down drying times. Ensure adequate ventilation.

Poor adhesion.

Make sure the subfloor is clean and primed properly, or the compound has been mixed to the correct specifications.

Pros and Cons

Pros

  • Fast setting time saves time on projects.
  • Suitable for a wide range of applications, both interior and exterior.
  • High durability due to water and frost resistance.
  • Easy to apply, leveling compound.
  • Can be used as a final wear surface.

Cons

  • Requires proper surface preparation for optimal adhesion.
  • Application thickness must be carefully monitored.
  • Requires a 2-3 hour drying time before use (depending on thickness and temperature).
  • May require additional tools for larger areas.

Setup, Compatibility & Care

Setup

  1. Surface Preparation: Ensure the subfloor is clean, dry, and free from loose debris, oil, or grease. Prime the surface with a suitable primer to enhance adhesion.
  2. Mixing: Mix the Cempolay Ultra Strong with the recommended amount of water according to the product instructions. Use a mixing drill to achieve a smooth, lump-free consistency.
  3. Application: Pour the mixed compound onto the prepared subfloor and use a trowel or gauge rake to spread it evenly to the desired thickness. A smoothing spike roller can be used to remove air bubbles.

Compatibility

The Bostik Cempolay Ultra Strong Smoothing Compound is compatible with:

  • Concrete
  • Sand/cement screeds
  • Primers (ensure compatibility with the specific primer used)

Care

  • Allow the compound to fully cure before applying any floor coverings. Foot traffic is allowed after 2 hours at 20°C, but the compound needs more time to fully cure.
  • Avoid exposing the compound to extreme temperatures or direct sunlight during application and curing.
  • Clean tools and equipment with water immediately after use. Once dried, the compound is difficult to remove.

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