SBR Polymer Screed

SBR Polymer screeds include a synthetic polymer resin providing increased toughness and substrate bonding properties. Cracking and shrinking is minimised, screed permeability is reduced and flexural strength is greatly improved. SBR Polymer screed provides high performance at thinner sections and is ideal when normal screed thicknesses cannot be achieved or whereby screed is to be applied to wet areas.

Our SBR Polymer screed uses admixtures designed to allow water reductions of up to 25% due to its powerful deflocculating and dispersing effect allowing a high water reduction without affecting the integrity of the mix, therefore, a thinner section can be achieved.

Product Compatibility

✓ Suitable for underfloor heating systems
✓ Directly to concrete ground floor slabs
✓ Installed to insulation boards
✓ Used with precast concrete units or beams
✓ To acoustic insulation systems
✓ Wet areas due to low porosity/permeability

Benefits

✓ Reduced permiability
✓ Suitable for wet areas
✓ Thinner minimum thicknesses
✓ Increased toughness and bond properties
✓ Improved flexural strength

Shrinkage & Cracking

With the addition of polypropylene fibres within the mix to help achieve a more cohesive screeding material – ultimately reducing the risk of early shrinkage and cracking. By incorporating fibres within the screed mix a three-dimensional system of secondary crack control reinforcement can be considered as a cost-effective alternative to steel wire fabric traditionally introduced for this purpose.

Drying Times

Allowing approximately 1 month per 25mm of thickness. Where the screed is above 50mm, 2 months per 25mm should be allowed. If the screed is extremely thick, or the concrete base has excessive moisture content drying times may be affected. High humidity or low ambient temperatures can delay the drying out process, we ensure the correct floor screed type is specified at quotation stage.

Deliveries

Ready-mixed bulk loads in tipper road trucks generally up to 10-20 tonnes. For smaller deliveries or to suit specific access requirements, screed deliveries can also be supplied in bulk bags.

Site mixed sand loads are delivered in tipper wagons or via bulk bags for smaller applications. Cement deliveries where possible are despatched to site via Moffett wagon allowing cement to be easily positioned at mixing areas with minimal disruption to the site.

Characteristics

30N/mm2 compressive strength after 28 days. Better impact/abrasion resistance against site traffic with improved performance for thinner, bonded floor screeds where normal minimum screed thicknesses cannot be achieved. Improved flexural strength, reduced permeability for wet areas.