Ronacrete Ronascreed Fast Dry Prompt 5L

£38.00 exl. VAT

Per Unit


Free Next Day Delivery if ordered before 1pm

  • Lay flooring over 50mm screeds after 4 days
  • Lay flooring over 75mm screeds after 6 days
  • Lay flooring over 100mm screeds after 6 days
  • Open to foot traffic next day
  • Early commissioning of underfloor heating
  • Liquid additive
  • BRE screed test Category A
  • Much more cost effective than cement replacement products
  • No license required

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Ronacrete Ronascreed Fast Dry Prompt 5L

RonaScreed FastDry Prompt 5L is a fast drying additive for site batched screeds used to quickly reduce the level of retained moisture within the screed. This allows floor coverings to be laid over the screed much sooner than with conventional screeds. RonaScreed FastDry Prompt gains strength quickly, permitting early access by following trades. Drying of screeds incorporating RonaScreed FastDry Prompt is influenced by heat generated during curing, meaning drying of thicker screeds is faster per millimetre of screed thickness. Screeds installed at 50mm can accept moisture sensitive floor coverings after only 4 days, whilst 75mm and 100mm screeds can accept the same coverings after only 6 days.

RonaScreed Fast Drying Additive for Site Batched Screeds screeds can be laid either bonded, unbonded or floating, determined by the substrate type. Bonded screeds must be laid on to a suitably prepared substrate (concrete slabs or existing screed). Unbonded screeds are those laid on a separating layer or preformed damp proof membrane. Floating screeds are those laid on to an insulation board or acoustic layer.


The drying speed of RonaScreed FastDry Prompt means commissioning of underfloor heating systems, or use of dehumidifiers, can commence after only 2 days at 75mm and 100mm thickness at 20°C and 60-65% air humidity.

The drying data is based on drying at 20°C and 65% relative humidity. Low temperature, high humidity, increased screed thickness and changing the mix design will delay drying. If the screed is covered with a curing membrane such as polythene, then the drying time starts when the membrane is removed. The relative humidity (RH) at the surface of the screed should be measured
with a hygrometer before proceeding to lay floor coverings. Standard practices should be followed.


Shelf life in unopened containers is 9 months. Store in a cool dry place. Protect from frost.

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Additional information


5L, 20L, 210L

Suitable for Substrates

Minimum Thickness: 35mm

Maximum Thickness:

Compressive Strength @ 28 days: 40 N/mm2

Walkable: 24 Hours

Finished Floor Laying After: 8 Days

Suitable for Substrates: Concrete



The Ronacrete group manufacture a comprehensive range of specialist materials for installation by expert contractors. For over 40 years, Ronacrete has been at the leading edge of product development and performance and across their six ranges, the company offer specialist solutions for a huge range of applications, from waterproofing and tanking to resin surfacing and specialist screed solutions.

Technical Information