Gypsol; Anhydrite binder for pumpable, self-smoothing floor screeds

LKAB Minerals’ Gypsol, the high-performance anhydrite binder, is a key component for the flooring industry. It is the primary ingredient in pumpable, self-smoothing floor screeds.

Your contact for:
Alan Jackson

Alan Jackson

National Commercial Manager Gypsol - UK & Ireland

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BBA approved Gypsol is used an environmentally friendly alternative to cement based screeds and can be used in a range of construction projects large or small. Building projects where Gypsol can prove beneficial include:

  • Schools
  • Nursing homes
  • Apartments
  • Community buildings
  • Retail
  • Houses
  • Refurbishments
  • Commercial projects

You will find case studies on the different projects in our DOCUMENTATION tab.

Where to buy Gypsol screed?

BBA approved Gypsol is available from more than 80 locations throughout the UK and Ireland. Our technical and specification experts cover the whole of the UK and Ireland and work with a range of quality assured manufacturing partners. The expertise available within the Gypsol team, combined with the manufacturing experience of our partners, means that we can offer an unbeatable package to meet all of your flowing screed requirements.

Our distribution network is continually growing to ensure easy availability of Gypsol screeds regardless of the size, nature and location of your project. Under the “WHERE TO BUY” tab, you will find an overview of most of the Gypsol suppliers.

Brands and manufacturers using Gypsol binder

There are several brands based on high-quality BBA approved Gypsol binder including:

Gypsol screeds are also readily available from several independent manufacturers. You can find an extensive list on the “where to buy” TAB.


Extensive Gypsol product range

BBA Approved Gypsol binder is the key component in all Gypsol free flowing self compacting floor screeds. Our technical experts have used this highly versatile and environmentally friendly material to develop a range of exclusive screed formats to suit every application. Each of these formats, including Gypsol Classic, our most widely used screed format and Gypsol Rapide screed, one of the fastest drying screeds of its type in the market, allow you to incorporate BBA approved Gypsol into just about any construction project.

  1. Rapide; A self-compacting, self-smoothing, fast-drying floor screed capable of drying in just 14 days from installation at 50mm depth
  2. Classic; Our general-purpose screeding system. The most commonly used material in our range and can be used in most applications
  3. HTC; Gypsol HTC (High Thermal Conductivity) specifically developed for use with underfloor heating and cooling systems as a high performance and thin screed system
  4. TS-15; An ultra-thin screed for bonded and un-bonded applications at a minimum depth of 15mm. Also perfect for use over low profile underfloor heating systems
  5. TS-20; A thin screed suitable for bonded and un-bonded applications down to a 20mm minimum depth.
  6. XS; Extra strength material for use in heavy-duty applications, where loading is likely to be higher than normal.
  7. TimBRE; Specially formulated and independently tested for use in timber frame and over timber supported floors including acoustic conditions.
  8. Summit; Formulated for pumping over very long distances or into very tall buildings of 10 stories and above.
  9. Modular; Designed for use in modular construction to allow early movement of units, also for a lightweight steel frame and Lewis Decking.
  10. Bagged Gypsol Screed; Pre-blended product supplied in 25kg bags for mixing on site. Ideal where minimal quantities are required, or access for ready-mix lorries is not possible.

Easy to place, Environmentally friendly, self-compacting, free-flowing screed

BBA Approved Gypsol is easily available from an extensive range of offsite and onsite mixing plants. Providing you with the many benefits including

reduced time and manpower on site reducing the cost of installation

Reduced manual handling using per mixed screed and protected pumping equipment reducing the health and safety impact on installers and lowering the risks to installers and sites.

No cement eliminating health risks associated with exposure to cement dust

Easy preparation, placement and finishing leading to better quality floors reducing the need for subsequent smoothing compounds

Fully self compacting requiring no secondary compaction leading to stronger and denser floor screed with much thinner depths

Very low embodied carbon reducing the environmental impact of the material

High thermal performance leading to high efficiency underfloor heating and cooling systems helping eliminate potential operational carbon emissions.


Easy to place, self-compacting, free-flowing anhydrite screed binder

An extensive range of offsite mixing plants uses our Gypsol. Providing you with the following benefits:

deliver the Gypsol screeds to site ready to uselabour intensive site mixing and associated mixing equipment
pumped directly to where they are neededmanual handling operations
pumped using equipment with closed or grilled dispensing hoppersrisk of contact with moving machinery
finished using a lightweight dappling barrequiring no secondary compaction most of the physical work needed to lay other screeds

This way of working significantly reduces the negative impact on the musculoskeletal system of installing contractors.

Sustainable Gypsol floor screed solution

As a company at the forefront of screed manufacture, we are ever conscious of the impact we and our customers have on the environment. We therefore continuously aim to reduce our carbon footprint and educate our customers and clients about how they can optimise their designs using Gypsol screeds and help minimise their environmental impact.

Gypsol screed provides benefits, including:

  • Low manufacturing carbon footprint
  • Low operating energy
  • Reduced lifetime impact
  • Low-temperature underfloor heating
  • Safer to work with
  • Low cost
  • Reduced waste
  • Low embodied energy

Due to the inherent properties of Gypsol Screed and its sustainable credentials, our material has been awarded Silver status by the Supply Chain School for Sustainability.

Low manufacturing carbon footprint

Our carbon footprint has been independently audited and certified, verifying that Gypsol Binder products just 120kg of carbon dioxide per 1 tonne of material manufactured. This compares favourably with cement manufacture, which exerts in the region of 900kg per 1 tonne of material produced.  You could, therefore, save up to 94% of the carbon emissions associated with the manufacture of your floor screed by switching from cement-based to Gypsol screed. Find out more in our carbon footprint guidance sheet.

Low operating energy

The more you reduce the energy used during the operational lifetime of a building, the lower the impact on the environment. Reducing your screed depth offers the opportunity to increase insulation depth. This enables the use of insulation systems which provide a lower GWP (Global Warming Potential) as well as reducing the heat loss through the floor, ensuring the building is as thermally efficient as possible.

Reduced lifetime impact

Gypsol screeds are 100% recyclable, which has a significant effect on the lifetime analysis of a building.

Low-temperature underfloor heating

When using underfloor heating, the key to efficiency is high thermal conductivity coupled with rapid response to changes in ambient conditions. Gypsol screeds offer thermal conductivity as high as 2.5 W/mK compared with 1:4 sand cement screed, which typically offers just 1.1W/mK.

This advantage, coupled with the thinner section, improves the floors ability to generate thermal inertia, increasing the coefficient of performance of the underfloor heating system by up to 25%. Altogether this results in much-reduced flow temperatures and corresponding energy savings.

Gypsol binder toxicology

Our LKAB Minerals’ Gypsol screeds emit no VOCs.

Gypsol origins

LKAB Minerals manufacture Gypsol binder from a by-product of the chemical industry. For every 1 tonne of Gypsol binder used 0.98 tonnes of landfill is avoided. Also, we are the only Anhydrite binder supplier with our own UK based manufacturing facility, ensuring control of the entire process and reducing the carbon footprint associated with transportation and logistics.

Safe to work with Gypsol screed

Gypsol binder does not contain Portland cement. Gypsol screed is supplied ready to use, significantly reducing the manual labour associated with other screed systems. Installation of Gypsol is carried out using specialist pumping equipment and does not require the installer to be on his hands and knees. Gypsol is fully self-compacting and therefore, reduces the negative on the musculoskeletal system of installers.

Low embodied energy

Unlike other binder systems, the manufacturing process for Gypsol binder requires no high-temperature production methods. This means that very little energy is used in the manufacture of our material. When incorporated into Gypsol Screed, it can also be used at much-reduced depths, requiring less material in the construction process. It also allows for more sustainable products to be used in conjunction with the screed, thus reducing the embodied energy of the building. For more information on optimising your design, contact your regional specifications manager.

Gypsol origin

We manufacture Gypsol anhydrite binder to UKCA/CE certified standards in the UK.  LKAB Minerals produce Gypsol binder from a by-product which we retrieve from the chemical industry. Previously this product was used as landfill.

Gypsol toxicology

A non-toxic, non-hazardous stable mineral. You can download the Safety Data Sheet from the documentation tab.

LKAB Minerals can provide support to assist with your Gypsol screed projects.

CPD’s and documentation

The internal support we offer consists of:

NBS Specifications

The Gypsol team can offer a comprehensive NBS Specification for your project. Contact your regional Technical Specification Manager for details.

BIM Modelling

Located with the NBS National BIM Library, BIM Modelling is a specification tool for designers. Our BIM Models are listed below:


The Royal Institute of British Architects (RIBA) provides support to Architects & designers:

For your convenience, we have a lot of background information available online about our entire Gypsol range.


We have several Gypsol related videos available to watch online.

General Gypsol videos

Product-related videos

  • Gypsol; What is Gypsol exactly? Where does it come from and what does it do?
  • Gypsol Complete; our first pre-blended composite screed binder. Gypsol complete offers flexibility and a cost-effective screed solution to the manufacturer whilst providing many other benefits.
  • Gypsol Diamond & Rustique; Gypsol screeds are available as finished flooring solutions, providing an aesthetically polished or rustic floor finish.

Application-related videos

  • Gypsol underfloor heating
  • Drying times of Gypsol; The drying times of Gypsol screeds are independently tested and can provide a finished floor solution in just 13 days.
  • Installing Gypsol Floor Screeds; Gypsol screeds provide a fast and efficient installation solution for any type of construction. This video provides an insight into the benefits of installing Gypsol screed in your commercial or domestic project

Online learning and CPD training

We regularly organize online webinars and training sessions which are recorded and made available to watch at your convenience. We advise you to check our online learning centre for the most up-to-date knowledge. This section of the website is set up in such a way that you will automatically receive a certificate after you have completed a session.

LKAB Minerals currently sells its Gypsol products in the UK only.

Sales points in the UK are:


Old Station Yard, Whiteley Rd, Ripley DE5 3QL, UK

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Aggregate Industries

Smith-Hall Ln, Hulland Ward, Ashbourne DE6 3ET, UK

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Aire Flo-Screed

Unit 2 Smeaton Ind Park, Went Edge Rd Pontefract, WF8 3LU

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A N Fraser

Innishail, South Laggan By Spean Bridge Spean Bridge Highlands PH34 4EA United Kingdom

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Ascus Screeding Ltd

Unit 12, Anglia Way Mansfield, Nottinghamshire, NG18 4LP

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Axtell Concrete

The Polo House, Forsyth’s Home Farm, A3 Northbound Carriageway, Hurtmore, Godalming, Surrey, GU8 6BS

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Bonar's quarrie

QUARRY: Bonars Quarry, Mountain Top, Fallard, County Donegal, Ireland

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Breedon Group

King Edward road, Greenhithe, DA9 9BT

170 ready-mix concrete plants throughout the UK
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Brett Concrete

Ashford Road Canterbury Kent CT4 7PP

Over 50 locations throughout the UK
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Capital Concrete

Brett House, St Michaels Close, Aylesford, Kent ME20 7XE

10 sites in the greater London area
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Teals Pit, Whisby Road, Whisby, Lincolnshire, LN6 9BY

Over 300 sites throughout the UK
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Lanark South Lanarkshire Scotland ML11 8SR

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CRH Roadstone

Cookstown Rd, Fortunestown, Dublin, Ireland

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Doncaster QuickMix Ltd

Clay Lane West, Doncaster, UK

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Rotherham Quickmix

Rotherham QuickMix Ltd, Tickhill Road, Maltby, Rotherham, UK

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Eastern Concrete Ltd

Eastern Concrete Limited Stowmarket Business Park Needham Road Stowmarket Suffolk IP14 2ED

4 different locations in the Eastern part of the UK
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Eco-Readymix Ltd

Eco-Readymix, Hafod, Wrexham, UK

Also location in Ellesmere Port CH65 4ET
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Ready 2 Pour

26 Lea Close, Bishops Stortford, CM23 5EA

serve a 30 mile radius covering Hertfordshire, Essex, London and Cambridgeshire
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Right Mix

Unit 6, Coleford Road, Darnall, Sheffield S9 5PH

4 different locations
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Fish Dock Rd, Dundee DD1 3LZ, UK

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Unit 8 West Station Business Park Spital Road Maldon Essex CM9 6FF

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Shorefix Construction Ltd

Kendorow treskewes farm ;Helston TR12 6NT

Delivers in Helston and the surrounding area
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Southern Liquid Screed

SLS Southern Liquid Screed, Lendorber Avenue, Cosham, Portsmouth, UK

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Southern Screed

High Clandon Farm Guildford Surrey GU4 7RP

supply and lay liquid screed to the whole of the South East including Surrey, London, Sussex, Kent, Hampshire, Buckinghamshire, Middlesex, Hertfordshire, Berkshire and all surrounding areas
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The Concrete Company Ltd.

Station Road, Thorney, Peterborough, PE6 0QE England

15 locations around the head office in Petersborough
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In Australia:

Bagged Gypsol is even available as Sureflo, which is supplied by national merchant CCF in 25 kg bags for mixing on site.

In case you are not sure who to contact, please check with the responsible Gypsol Technical and Specifications Manager. The below map provides you with more details.

Daniel Gordon – Scotland, Northern-Ireland, Ireland, London, South East England
T: +44(0) 7889 810046 – Email:

Iain Bradwell – Northern England, North Wales
T: +44(0) 7475 782513 – Email:

Alan Jackson – Eastern England
T: +44(0) 7966 651006 – Email:

Ian Mitchell – Western & South West England, South Wales
T: +44(0) 7971 868608 – Email:

Nick Aitken – London and South East
T: + 44 7443 824389 – Email:

  • How thin can I lay Gypsol screeds?


    Bonded: 15 mm (TS-15)
    Unbonded: 15 mm (TS-15)
    Floating domestic: 35 mm
    Floating commercial: 40 mm
    With underfloor heating: 20 mm cover to pipes (HTC)

  • What is the benefit of using Gypsol screeds with underfloor heating?


    There are a few benefits of using Gypsol screeds with underfloor heating. The minimum cover to the heating element needs only to be 20mm using HTC screed, so the heat only has to travel through 20mm of floor screed before you start to feel the heat. Gypsol screeds are self-compacting making them denser compared to hand applied floor screeds. This means that the heat will travel through the screed more quickly. You install the screed in a very fluid state, intimately encapsulating the heating elements and drawing the heat from every surface.
    This means that the reaction times will be faster, reaching your desired temperature more quickly.
    The Gypsol team can offer you advice on bay sizes and the location of expansion joints; this is important where underfloor heating is employed.

  • What is the cost of using Gypsol screeds compared with other floor screeds?


    To gain an accurate comparison, measure the cost of installation per square metre of floor rather than the cost of material per tonne or metre cubed. Because you can lay Gypsol screed much thinner than conventional sand cement screeds more square metres of floor is covered. For example, a sand/cement floor screed without underfloor heating laid on insulation should be at least 65mm deep. In this example, it means that you can only cover 15 square metres with one cubic metre of material. However, the same floor laid using a Gypsol floor screed at 40mm deep would cover 25 square metres.
    This also allows the potential to change insulation types to more cost-effective options, offering significant cost savings for your floor.

  • Can I install tiles or vinyl onto Gypsol screeds?


    You can lay any floor covering onto Gypsol floor screeds, including carpets, tiles, vinyl, LVT and resin floor systems. As with all screeds, whether cementitious or Gypsol, will need to be properly prepared; clean, dry, mechanically abraded and primed.
    Best practice is quoted by the Contract Flooring Association in their guide to contract flooring.
    Also, any underfloor heating should be commissioned and run prior to installing floor finishes.

  • Can Gypsol screeds be used for outdoor use?


    We recommend that you use Gypsol screeds only in weather tight environments. The Gypsol team can offer you advice on all aspects of the floor installation, and can even draw up a floor specification which you can present to your contractor for tendering purposes. Just call us for professional advice.