Available to purchase online @ ronacreteshop.co.uk Visit the store

Fast drying screed additive

Description

RonaScreed FastDry Prompt 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 8 days, 75mm screeds can accept the same coverings after only 9 days and 100mm screeds after only 10 days.

Time taken to achieve 75% RH at the surface of the screed
Screed Type50mm75mm100mm
RonaScreed FastDry Prompt8 days9 days10 days
Market competitor14 days21 daysNo data
Standard sand and cement50 days100 days175 days

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.

 

The drying speed of RonaScreed FastDry Prompt means commissioning of underfloor heating systems, or use of dehumidifiers can commence after only 6 days at 75mm thickness and 7 days at 100mm thickness at 20°C and 60-65% air humidity.

 

RonaScreed FastDry Prompt 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.

 

RonaScreed FastDry Prompt is supplied in 20, 210, and 1000 litre units.

    Quick Question?







    Our Product range

    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 ...

    Read more

    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 ...

    Read more

    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 ...

    Read more

    Here to help...