SCREED X Engineered Screed 20kg

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Self-levelling engineered screed powder. Flows to 3mm, sets in 3 hours, high early strength.

SCREED-X is a powder screed mix designed for high-flow self-levelling on floors over waterproofing membranes. Adds 3mm in one pour, sets in 3 hours at 20°C and develops fast strength for foot traffic.

Where to use it

  • Over-laying waterproofed wet area floors before tiling or protective layer
  • Levelling uneven concrete substrates
  • Creating fall for drainage in wet areas

Why waterproofers buy it

  • Self-levelling. Flows to 3mm without trowelling
  • Rapid setting, 3 hours to foot traffic
  • Early strength development for quick scheduling
  • Mix with water on site. No special equipment
  • Fibre reinforced to reduce shrinkage cracking

Coverage

20kg bag covers approximately 2 to 3 m² at 3mm thickness.

Not for

Vertical surfaces, ambient temperatures below 5°C, or areas exposed to heavy water flow during cure.

Walkable in 2-3 hours, tile from 12 hours
17 MPa at 1 day, 30 MPa final compressive strength
Approved at 35 mm minimum unbonded over FORSPEC membranes

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Forspec Screed X Engineered Screed 20kg high-performance rapid drying cement screed for internal and external applications, suitable for 10mm to 100mm thickness, pumpable or hand applied.

SCREED X Engineered Screed 20kg

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Roselands NSW 2196
Australia

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Technical overview

FORSPEC SCREEDX is a pre-blended, high-strength rapid structural screed with MINERALCORE technology, for bonded, unbonded and floating screeds from 10 mm to 100 mm, including screeds over underfloor heating. It produces screed mortar of the type covered by EN 13813, with an indicative designation of CT-C30-F5, and screed installation, thickness and jointing comply with AS 3958.1. No Australian Standard specifically governs proprietary screed mortars. The Technical Data Sheet cites no accredited test report, so all performance values are published as Forspec R&D characteristic data. Test reports are available on request.

Key applications

  • Bonded screeds (minimum 10 mm; 5 mm with the enhanced mix and FORSPEC approval) over prepared concrete
  • Unbonded screeds - minimum 40 mm per AS 3958.1; 35 mm minimum as the FORSPEC engineered screed over FORSPEC membranes
  • Floating screeds (minimum 45 mm) over insulation and acoustic layers
  • Screeds incorporating underfloor heating systems
  • Screed repairs, ramping and substrate build-up
  • Pre-waterproofing substrates and screeds under resilient flooring, in residential, commercial, retail and high-traffic public spaces

Surface suitability

  • Concrete (structurally sound, mechanically profiled by diamond grinding or shot-blasting, minimum 1.5 MPa tensile pull strength)
  • Metal (non-porous, primed with ACTFLEX 300 or ACTFLEX SUPERPRIME 008)
  • PVC (non-porous, primed with ACTFLEX 300 or ACTFLEX SUPERPRIME 008)
  • Cured, flood-tested FORSPEC membranes (unbonded over a 200-micron slip sheet, 35 mm minimum)
  • Insulation panels and acoustic layers (floating screed, minimum 45 mm)

Apply between 5C and 30C ambient and substrate, and protect from frost, rain and rapid drying during placement and early cure. Substrates must achieve a tensile pull strength of at least 1.5 MPa. Unbonded screeds are minimum 40 mm per AS 3958.1; the engineered 35 mm minimum applies only over FORSPEC membranes installed per the TDS with mesh reinforcement and a 200-micron slip sheet, and below 35 mm only with written FORSPEC approval. Never exceed the water demand of 1.2-1.4 L per bag and never remix or re-temper stiffened mortar. Do not use free-fall drum mixers. Moisture-sensitive coverings only once residual moisture is below the covering manufacturer's limit, measured with a carbide hygrometer. Movement, structural and expansion joints must be carried through the full screed and finish. Do not use material from damaged or moisture-affected bags. The product contains portland cement and may contain respirable crystalline silica, and the wet mix is alkaline and can cause burns to skin and eyes: wear a P2 dust respirator, chemical-resistant gloves, protective eyewear and covering clothing, and mix in ventilated conditions.

Technical Specifications

Screed ClassificationCT-C30-F5 indicative designation (EN 13813)
Material TypeCT - cementitious, pre-blended (EN 13813)
Form and ColourPre-blended grey powder, graded mineral aggregate and binder, 5:1 by weight
Compressive Strength30 MPa at 28 days, Class C30 (AS 1012.9)*
Compressive Strength Development17 / 25 / 30 MPa at 1 / 7 / 28 days (AS 1012.9)*
Flexural Strength5 MPa at 28 days, Class F5 (AS 1012.11)*
Screed Thickness Range10-100 mm (bonded, unbonded and floating systems)
Minimum Thickness Bonded10 mm; 5 mm with the ACTFLEX 300 + FIBRE X enhanced mix and written FORSPEC approval
Minimum Thickness Unbonded40 mm per AS 3958.1; 35 mm engineered minimum over FORSPEC membranes
Minimum Thickness Floating45 mm
Water Demand1.2-1.4 L per 20 kg bag
Mixing Time3-4 minutes to a cohesive, semi-dry mortar
Working TimeApproximately 60 minutes at 25C, 50% RH
Foot Traffic2-3 hours at 25C, 50% RH
TilingFrom 12 hours at 25C, 50% RH
Residual MoistureLess than 4% at 24 hours, 25C, 50% RH
VOC EmissionLess than 0.5 mg/m3*
Application Temperature5-30C ambient and substrate
Substrate Tensile Pull StrengthMinimum 1.5 MPa
ConsumptionApproximately 16-18 kg per m2 per 10 mm of thickness
YieldApproximately 11.5-12.0 litres of compacted screed per 20 kg bag
Packaging20 kg moisture-sealed plastic-lined paper bag; 50-bag pallet (1,000 kg)
Shelf Life12 months, unopened bags, stored dry
* Typical Forspec R&D characteristic values

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Frequently asked questions

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  • What is SCREED X used for?
    Compatibility

    SCREED X is a pre-blended structural screed for bonded, unbonded, and floating floors. The pre-blend ensures consistent ratios and saves the contractor having to source and measure their own sand. Suitable for commercial and domestic projects.

  • What's the strength rating?
    Performance

    SCREED X reaches 30 MPa at 28 days - matching FORCEM's strength rating in a pre-blended format. Reaches less than 4% residual moisture in 24 hours, allowing next-day waterproofing membrane application.

  • Coverage and curing schedule?
    Installation

    Coverage is 16-18 kg per m² per cm of thickness. Walkable in 2-3 hours, tile-ready in 12 hours, membrane-ready in 24 hours. One-hour extended working time gives ample time to finish large pours.

  • What thickness can I apply?
    Compatibility

    Bonded screeds minimum 10mm, unbonded minimum 40mm, floating minimum 45mm. The substrate must have pull strength of at least 1.5 MPa for bonded application. Use a slurry coat plus ACTFLEX 300 primer for improved bond.

  • Compatible with underfloor heating?
    Performance

    Yes. SCREED X is fully compatible with underfloor heating systems. The MineralCore technology delivers controlled shrinkage, minimising the risk of cracking around heating elements.

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