SCREED X Rapid screed
Rapid structural screed with Mineralcore technology
Pre-blended 30 MPa screed. Walk on it in 2 to 3 hours, tile from 12 hours.
How SCREED X goes on
SCREED X coverage, coats and cure times
Factory-blended rapid screed: just add water. It builds 10 to 100 mm as a bonded, unbonded or floating screed, including over underfloor heating.
- Coverage
- 16–18 kg/m²per 10 mm of thickness · TDS p2
- Per bag
- ≈ 1.15–1.20 m²one 20 kg bag at 10 mm thick · TDS p2
- Thickness
- 10–100 mmbonded, unbonded and floating screeds · TDS p2
- Walk on
- 2–3 htypicalfoot traffic · TDS p2
- Tile from
- 12 htypicalafter placing · TDS p2
- Membrane from
- 24 htypicalonce residual moisture is below 4.5% · TDS p4
- Strength
- 30 MPatypicalat 28 days; 17 MPa at 1 day · TDS p2
- Water
- 1.2–1.4 Lper 20 kg bag, never more · TDS p2
- Apply at
- 5–30°Cair and surface · TDS p2
From the FORSPEC data sheet, TDS-SCREEDX · Revision 3 · 12 November 2026. Times are at 25°C and 50% relative humidity unless the data sheet says otherwise. Typical = FORSPEC’s own typical value, not a laboratory-certified one.
SCREED X on site
More FORSPEC jobs
Where SCREED X is used
Use it for
- Bonded screeds over prepared concrete, from 10 mm
- Unbonded screeds over FORSPEC membranes, from 35 mm
- Floating screeds over insulation and acoustic layers, from 45 mm
- Screeds with underfloor heating
- Screed repairs, ramps and build-up
- Under tiles, waterproofing and resilient flooring
Know before you start
- Unbonded screeds under 35 mm need written FORSPEC approval
- Never add more than 1.2 to 1.4 L of water per bag or re-temper a stiff mix
- Do not use a free-fall drum mixer
- The substrate needs a tensile pull strength of at least 1.5 MPa
How to apply SCREED X
- 01
Prepare
Sound, clean concrete, ground or shot-blasted where smooth, vacuumed. Lightly dampen absorbent surfaces with no free water left on them.
- 02
Bond or separate
Bonded: brush on a slurry of 3 parts FORCEM SCREED BINDER to 2 parts ACTFLEX 300 by weight and lay the screed into it wet. Unbonded over a membrane: lay over a double slip sheet, laps 200 mm.
- 03
Mix
1.2 to 1.4 L of clean water in the mixer first, then the full 20 kg bag. Mix 3 to 4 minutes in a forced-action or paddle mixer to a semi-dry mortar.
- 04
Place
Spread, compact and float within the 60-minute working time. Compact solidly: that is what develops the strength.
- 05
Joints
Compressible strip at walls and columns. Cut control joints to one-third of the screed depth while workable. Carry substrate movement joints through the screed.
- 06
Cure
Protect from sun, wind and frost. Walk on it after 2 to 3 hours, tile from 12 hours, and apply a membrane once moisture is below 4.5%, from 24 hours.
A short guide from the data sheet. Read the full SCREED X TDS before you start.
How many bags of SCREED X do I need?
Pre-blended screed, 20 kg bag
Allows 18 kg per m² for every 10 mm, the top of the TDS range of 16 to 18 kg, so you do not run short. One 20 kg bag covers about 1.1 m² at 10 mm. Minimums: bonded 10 mm, unbonded 35 mm over a FORSPEC membrane on a double slip sheet, floating 45 mm.
You need
0 bags
Where the figures come from
Allows 18 kg per m² for every 10 mm, the top of the TDS range of 16 to 18 kg, so you do not run short. One 20 kg bag covers about 1.1 m² at 10 mm. Minimums: bonded 10 mm, unbonded 35 mm over a FORSPEC membrane on a double slip sheet, floating 45 mm.
- Consumption: about 16 to 18 kg per m² per 10 mm (18 used). TDS-SCREEDX, R3, 12 Nov 2026, page 2
- Yield per 20 kg bag: about 11.5 to 12.0 L compacted; 1.15 to 1.20 m² at 10 mm. TDS-SCREEDX, R3, 12 Nov 2026, page 2
- Minimum thickness: bonded 10 mm; unbonded 40 mm, engineered 35 mm over FORSPEC membranes; floating 45 mm. TDS-SCREEDX, R3, 12 Nov 2026, page 3
- Unbonded over a membrane: 35 mm is the FORSPEC system figure, on a double slip sheet. FORSPEC system figure
- Pack: 20 kg bag; 50-bag pallet. TDS-SCREEDX, R3, 12 Nov 2026, page 2
More: SCREED X product page · Balconies & podiums system · Screeds & levelling system
Drawings for the systems it goes in
FORSPEC standard details as PDF and DXF. Each sheet is a generic detail: the specification names the products.
SCREED X test reports and compliance
- Compressive strength, 28 days
- 30 MPa (Class C30)AS 1012.9, FORSPEC R&D data
- Flexural strength, 28 days
- 5 MPa (Class F5)AS 1012.11, FORSPEC R&D data
Results as stated in the data sheet, TDS-SCREEDX · Revision 3 · 12 November 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
SCREED X questions
How many bags of SCREED X do I need?
Allow about 16 to 18 kg per square metre for every 10 mm of thickness. One 20 kg bag covers about 1.15 to 1.20 m² at 10 mm, or about 0.29 to 0.30 m² at 40 mm.
How thick can SCREED X be laid?
From 10 mm to 100 mm. Bonded screeds start at 10 mm, unbonded screeds over FORSPEC membranes at 35 mm, and floating screeds at 45 mm.
When can I tile over it?
From 12 hours at 25°C. It takes foot traffic after 2 to 3 hours.
When can I waterproof over it?
Once the residual moisture is below 4.5%, which is from 24 hours at 25°C, checked with a carbide hygrometer.
Do I need to add sand or cement?
No. SCREED X is pre-blended. Add 1.2 to 1.4 L of clean water to each 20 kg bag and nothing else.
Can it go over underfloor heating?
Yes. Place the reinforcement to suit the heating design and bring the heating on gradually after the screed has cured.
Used with SCREED X
SCREED X TDS and SDS
Always work from the current data sheet. Every FORSPEC TDS and SDS →
Specify it. Or buy it.
Send the drawings or photos and FORSPEC comes back with the system, the details and the quantities. Or find a FORSPEC stockist for SCREED X.