Product Data Sheet Show all documents
Ronabond® DB-U

Ronabond® DB-U

Shrinkage Compensated Self-smoothing Cementitious Underlayment

Ronabond® DB-U is a fast setting flow applied cementitious underlayment that is ideal for levelling screeds in preparation to receive wooden, vinyl and carpet floors. Shrinkage compensated and fast curing it can accept foot traffic after about 10 hours. With close adherence to the simple mixing and installation instructions Ronabond® DB-U produces a smooth finish ready for a final covering. It is compatible with most commonly used adhesives, carpet, linoleum and similar floor finishes as well as with hard wood flooring, ceramic tiles etc.  

  • Shrinkage compensated & fast cure
  • Self-smoothing, does not require troweling to finish
  • Can be pumped or poured
  • Fast application, hence minimum disruption and down time
  • Economical – lower cost than resin based systems
Product Data Sheet Show all documents

Usage

Levelling screed for the installation of :
  • Wood floorings
  • Vinyl floorings
  • Ceramic tiles floorings
  • Carpets floorings

Advantages

  • Shrinkage compensated & fast cure
  • Self-smoothing, does not require troweling to finish
  • Can be pumped or poured
  • Fast application, hence minimum disruption and down time
  • Economical – lower cost than resin based systems

Packaging

25 kg bag

Colour

Grey

Product Details

Product Information

Shelf Life

6 months from the date of production

Storage Conditions

Stored properly in undamaged and unopened original sealed packaging in the dry conditions. Protect from direct sunlight, moisture and frost.
Technical Information

Compressive Strength

> 10 MPa at 24 hours

> 25 MPa at 28 days

Tensile Strength in Flexure

> 7 MPa at 28 days

Tensile Adhesion Strength

> 0.5 MPa at 28 days

Application

Application Information

Layer Thickness

5–30 mm
Consumption

Yield

Approx. 15 litres, suitable for 3 m2 per bag at 5 mm thick
Application steps

MIXING

Ronabond® DB-U is mixed with the specified quantity of clean, potable water using the appropriate forced action mixer or pump equipment. For hand mixing the material should be mixed with a low or medium speed drill and paddle for at least 2 minutes and until free from lumps. The material should then be left for 5 minutes and briefly remixed for 30 seconds before being poured into place. For pump mixing the flow rate should be adjusted to achieve the initial flow of ~ 135 mm. A PFT G5 pump with a 20 metre hose has been found suitable. The water addition should be closely equivalent to 5.5 litres per 25 kg bag.

APPLICATION

After pouring or pumping the mixed material onto the primed substrate the material should be levelled to the desired thickness using a pin leveler, squeegee, notched trowel or similar. Subsequent mixes should be applied onto a wet edge and similarly levelled. Use the equipment to move the material into corners, low spots and around fittings.

 

As soon as the level has been achieved and before the material starts to lose workability use a spiked roller to help any trapped air travel to the surface. Failure to do this will result in pinholes and blemishes in the surface.

CLEANING OF TOOLS

Clean all tools and application equipment with clean water immediately after use. Hardened / cured material can only be removed mechanically.

Documents