Ronascreed Self Smoothing Exterior Screed – Resurfacing & Levelling
Ronascreed Self Smoothing Exterior Screed – Resurfacing & Levelling. RonaScreed Self Smoothing Exterior Screed is a flow applied industrial flooring system. It provides a hard, durable floor surface for new floors or for renovating existing surfaces. The material gains strength quickly and can be accessed by foot traffic in 4—5 hours and by light to medium traffic after 24 hours @ 20ºC.
When applied correctly, RonaScreed Self Smoothing Exterior Screed produces a smooth, durable wearing surface. The application thickness can vary, ranging from 5mm to 40mm. For optimum performance and appearance RonaScreed Self Smoothing Exterior Screed should be applied by specialist industrial floor layers with expert knowledge of preparation, mixing and application.
- Self smoothing, does not require trowelling.
- Can be pumped or poured.
- Very fast application reduces disruption and down time.
- Economical—lower cost than resin based systems.
- Suitable for exterior use.
- Manufactured under a Quality Assurance Scheme to BSEN ISO 9001
The condition of the surface to be treated is of great importance. The substrate must be mechanically prepared e.g. scabbled, milled or shot blasted. All laitance and contamination must be removed to leave a clean aggregate exposed finish. Testing and assessment to BS8204 Part 3 should be conducted before proceeding with vacuum cleaning, sealing and priming.
Seal the prepared surface by applying one or more coats of RonaScreed Self Smooth Primer diluted with 5 parts water at the rate of 0.62 litres/m². Allow to dry for not more than 36 hours; protect the surface and keep clean. Note that inadequate sealing will increase the risk of pinholing. Very porous substrates may require the application of two or more coats of sealer. Whilst it is difficult to determine whether a substrate has been sufficiently sealed, a sheen on the surface of the substrate is an indication of adequate sealing.
Prime the sealed surface by applying one coat of RonaScreed Self Smooth Primer diluted with 3 parts water at the rate of 0.71 litres/m². Brush this well into
the surface. Apply RonaScreed Self Smoothing Exterior Screed whilst primer is tacky; typically between 2-4 hours after application based on material, ambient and substrate condition of 20°C @ 65%RH.
RonaScreed Self Smoothing Exterior Screed may be applied either by pouring or using a specialist mixer/pump. For pump applications it is recommended that a contractor with the necessary experience to carry out this type of work is employed. For a list of such contractors contact the Ronacrete Technical Department.
For poured application place the specified quantity of clean water into a mixing vessel.
Gradually add the RonaScreed Self Smoothing Exterior Screed whilst continuously mixing with a slow speed drill and helical paddle until fully blended. A forced action mixer such as Baron or CreteAngle may also be used. The mixed material is poured or pumped onto the prepared and sealed/primed surface and levelled with a pin rake. Spike rolling is necessary to release entrapped air. Pins may be placed in the floor to set out the required levels. Pumped screeds should be filtered by a fine mesh attachment at the end of the hose.
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