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Ultraflo® liquid floor screed


At RTU we have established our reputation, by consistently producing and delivering top quality products and services.   Ultraflo hemihydrate liquid screed is the latest product to be added to our extensive range. Through our range of factory mixed products, which are delivered directly to site, RTU guarantee a consistent and high quality mix in every load.

what is ultraflo?

Ultraflo is a hemihydrate calcium sulphate based screed. Hemihydrate floor screeds have been developed in Germany and have been used successfully throughout Europe for over 25 years. ultraflo is an environmentally friendly product, manufactured from a by product of flu gas desulphurisation. As a result of this ultraflo has been awarded many prestigious environmental awards.

why choose ultraflo?

As Ultraflo is not a cement-based product it has minimal shrinkage cracking and curling; issues more commonly associated with traditional screeds.

Ultraflo screed is liquid in nature, which flows to give a self-smoothing finish, and is virtually self-leveling. Ultraflo is pump applied and only requires minimal tamping to achieve a smooth level surface that is able to take light traffic after only 24hours.  Unlike anhydrite screeds, ultraflo hemihydrate screed is not subject to formation of any surface layers or laitance.

As a result its high compressive and flexural strengths ultraflo can be installed at minimum depth of 30mm. The shallower depths result in reduced weight and significantly shorter drying times.

liquid screed for underfloor heating - ULTRAFLO

Ultraflo screed is suitable for most floating floor applications, such as residential, commercial, industrial, health and education. It is inorganic and bacteria resistant which make it the perfect solution for buildings where infection control is paramount, such as hospitals, schools or pharmaceutical factories.

Ultraflo offers superb benefits when used with under floor heating systems.  It is a solid high-density screed with a greater thermal conductivity than traditional screeds. As a result of this, under floor heating systems can operate at significantly lower temperatures than those used with traditional screed, to produce the equivalent room temperatures. The liquid nature of the screed enables it to fully encapsulate the under floor heating pipes, to give maximum heat transfer into the screed. Ultraflo greatly improves the efficiency of under floor heating systems and significantly improves the heat response time.

RTU approved installers are capable of laying up to 2000M2 per day, with a minimum requirement for movement joints.


Ultraflo is a quality assured product.  It has been designed to comply with the requirements of BS EN 13813:2002 and is CE Certified. Regular testing is completed by our in house laboratory and each load is tested for flow characteristics prior to discharge to ensure a consistent quality product.

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