Technical Data


GVYLON FLOWING SCREED is a blend of GYVLON BINDER, special additives and selected aggregates mixed with clean potable water to produce a pumpable self smoothing, flowing screed (manufactured to BSEN 13813:2002). 


GYVLON FLOWING SCREED is designed to provide a smooth level surface in both commercial and domestic buildings prior to the application of floor finishes. It can be used Bonded. unbonded or floating and with or without UFH. For advice on specifications and for proprietary systems contact your Gyvlon Area Technical & Specifications Manager. 

Product features

Self compacting Self curing.

Can be walked on in 24-48 hours.

Can be loaded after 7 days

No reinforcement required.

Ideal for use with under floor heating

Can be force dried as early as 7 days after application.

Dries at a rate of 1mm per day up to a screed depth of 40mm and 1/2mm per day after that depth in good drying conditions

Easily achieves SR2 finish as described in BS8204.

Protein free -cannot harbour harmful bacteria.

Non combustible (tested to BS476 Part 4).

Minimal Thermal expansion (0.012mm/mK).

Excellent thermal conductivity.

Environmentally friendly

Minimum Application Thickness

 Bonded:                                  25mm

 In contact with substrate:       30mm

Unbonded:                              30mm 

Floating Commercial:              40mm 
Floating Domestic:                  35mm 

 Underfloor Heating:               25mm minimum

                                               (30mm nominal) cover  to pipes, heating elements


GYVLON FLOWING SCREED is supplied via a concrete plant in truck mixers, Transmix trucks or in pre blended bags. 


Gyvlon Binder – 98% Recycled Content 

Gyvlon Screed – Average 36% Recycled Content
Recyclability – 100% Recyclable 
VOC Content – VOC Free 

Technical Data

Appearance/Colour: Off-white fluid mortar 

Water demand: 13-18 % b.w 
pH: > 10
Wet Density: 2200 kg/m3 
Dry Density: 2000 kg/m3 
           Typical Screed Properties: 
Compressive Strength: C25 N/mm2 
Flexural Strength: F4 N/mm2 
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