RonaScreed 8 Day Overlay and RonaScreed FastDry Prompt


On 1st July 2021, RonaScreed 8 Day Overlay will be replaced with RonaScreed FastDry Prompt.


Several months ago, we developed a new product based on the same technology as RonaScreed 8 Day Overlay, called RonaScreed FastDry Prompt and achieved highly impressive results that were superior to RonaScreed 8 Day Overlay in every way. Vinci Technology Centre verified these results. We have since conducted further testing using an increased dose of RonaScreed FastDry Prompt in a screed mix, and the results were significantly better.


What are the benefits of RonaScreed FastDry Prompt?

RonaScreed FastDry Prompt has been designed to reduce the drying times of screeds. This allows for earlier covering with moisture sensitive floor coverings, such as carpet, tiles, vinyl and timber flooring. The accelerated drying also allows the commissioning of underfloor heating to commence far earlier than with traditional sand/ cement screeds.

  • Cover 50mm screeds after only four days
  • Cover 75-100mm screeds after only six days.
  • Commence commissioning of underfloor heating after only two days.
  • Cost-effective – from as little as £1.00 per m2 (based on 50mm screed)
  • High 24-hour compressive strength
  • No license required.


For the past few months, we have been manufacturing RonaScreed 8 Day Overlay and RonaScreed FastDry Prompt; however, from 1st July 2021, we will only be manufacturing RonaScreed FastDry Prompt. Below is a comparison table to demonstrate the improved performance of RonaScreed FastDry Prompt compared to RonaScreed 8 Day Overlay.

 75% RH @ 50mm75% RH @ 75mm75% RH @ 100mmCommission Undefloor Heating
RonaScreed FastDry Prompt (Mix 1 & 2)8 days9 days10 days6 days
RonaScreed FastDry Prompt (Mix 3)4 days6 days6 days2 days
RonaScreed 8 Day Overlay8 days15 days21 days9 days

RonaScreed 8 Day Overlay Fast Drying Screed – benefits and drying

RonaScreed 8 Day Overlay Fast Drying Screed (formerly Uniscreed Standard) is so called because it is a fast-drying screed additive which enables a 50mm thickness of 3:1 sand/ cement screed to be overl ...

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Drying of Screeds

BS 8204-1 “Concrete bases and cementitious levelling screeds to receive floorings — Code of practice” section 6.11.1 suggests the following calculation for drying of screeds with no fast drying additi ...

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Avoidance/ Mitigation Of The Effects Of Common Forms Of Cracking In Cementitious Screeds

Aggregate is usually 0–4 mm and is mixed with cement in the ratio of 1:3 or 1:4 cement to sand, depending on strength requirements and drying requirements. For total screed thicknesses in excess of 50 ...

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