LEVEL X Levelling compound
High-flow self-levelling and smoothing compound
High-flow, pumpable levelling compound from 1.5 to 100 mm in one pass. Walkable in 2 hours.
How LEVEL X goes on
LEVEL X coverage, coats and cure times
Polymer-modified cementitious levelling compound for internal floors over concrete, screeds and correctly primed damp substrates. It takes vinyl, carpet, timber, tiles, epoxy and FORSPEC membranes.
- Thickness
- 1.5–100 mmper pass; aggregate-extended mix for 30–100 mm · TDS p2
- Coverage
- ≈ 7.8 m²per 20 kg bag at 1.5 mm; about 2.3 m² at 5 mm · TDS p2
- Consumption
- ≈ 1.7 kg/m²of powder per m² per mm of thickness · TDS p2
- Mixing water
- 4.4–4.8 Lper 20 kg bag, standard mix · TDS p2
- Open time
- 20–30 minto place the mix once mixed · TDS p2
- Walkable
- 2 hfoot traffic; topping layers and membranes from 4 h · TDS p4
- Coverings
- From 24 hbonded floor coverings, thickness-dependent · TDS p2
- Compressive
- 35 MPatypicalat 28 days; 15 MPa at 1 day, 25 MPa at 7 days · TDS p2
- Apply at
- 10–30°Cambient and substrate; optimal 18–25°C · TDS p2
From the FORSPEC data sheet, TDS-LEVELX · Revision 2 · 12 August 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.
LEVEL X on site
More FORSPEC jobs
Where LEVEL X is used
Use it for
- Levelling internal concrete floors for vinyl, carpet, timber or tiles
- Deep fills and slab regularisation, 30–100 mm with aggregate
- Ramps, transitions and drainage falls with the stiff mix
- Substrate under FORSPEC membrane systems in wet areas
- Floors with hydronic or electric underfloor heating
- Protected external levelling, primed as the TDS says
Know before you start
- Not a final wear surface: cover with tile, vinyl, epoxy or other flooring
- Not a structural screed, and not for surfaces that move or flex
- Not for permanently wet or submerged service
- Not below 10°C or above 30°C, ambient or substrate
Its FORSPEC systems
How to apply LEVEL X
- 01
Prepare
Sound, rigid substrate, new concrete 28 days. Grind, shot-blast or scarify to CSP 3–6. Remove oil, curing compounds and sealers, then vacuum. Test moisture.
- 02
Prime
Priming is mandatory. Moisture 4.5% or less: ACTFLEX 300. Over 4.5% or green concrete under 28 days: two coats of ACTFLEX EP250, sand-seeded.
- 03
Contain
Form up doorways, drains, penetrations and level changes first. The mix is high-flow and finds any opening. Carry movement joints through.
- 04
Mix
4.4–4.8 L clean water first, then one full 20 kg bag. Paddle at 400–600 RPM for 2–3 minutes, rest 1 minute, remix briefly and pour. Pumps suit large areas.
- 05
Pour
Pour onto the tacky primer, keep a wet edge, spread to thickness and spike-roll in both directions. Do not float or over-trowel.
- 06
Cure
Foot traffic from 2 hours, membranes and topping layers from 4 hours, floor coverings from 24 hours. Protect from wind, sun and drafts.
A short guide from the data sheet. Read the full LEVEL X TDS before you start.
How many bags of LEVEL X do I need?
Self-levelling compound, 20 kg bag
About 1.7 kg of powder per m² per mm (11.7 L of mix per bag). Over 30 mm the bulk-fill mix applies: up to 20 kg of 2 to 5 mm gravel per bag adds about 7.5 L, then a neat finish layer (3 mm). Measure the depth at several points: the average sets the bags.
You need
0 bags
Where the figures come from
About 1.7 kg of powder per m² per mm (11.7 L of mix per bag). Over 30 mm the bulk-fill mix applies: up to 20 kg of 2 to 5 mm gravel per bag adds about 7.5 L, then a neat finish layer (3 mm). Measure the depth at several points: the average sets the bags.
- Powder consumption: about 1.7 kg per m² per mm. TDS-LEVELX, R2, 12 Aug 2026, page 2
- Yield per 20 kg bag; bulk fill: about 11.7 L; + 20 kg of 2 to 5 mm gravel adds about 7.5 L. TDS-LEVELX, R2, 12 Aug 2026, page 2
- Application thickness: 1.5 to 100 mm per pass. TDS-LEVELX, R2, 12 Aug 2026, page 2
- Damp or green slab primer: two coats of EP 250 at about 3 m² per litre per coat; sand at about 700 g/m². TDS-LEVELX, R2, 12 Aug 2026, page 4
- ACTFLEX 300 tack coat: 15 kg pail primes about 45 to 75 m² per coat (45 used). TDS-ACTFLEX300, R2, 12 Aug 2026, page 3
- Neat finish layer over bulk fill: 3 mm. FORSPEC system figure
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.
LEVEL X test reports and compliance
- EN 13813 designation
- Indicative CT-C35-F7Forspec R&D data, no test report cited
- Compressive, 28 days
- Class C35, 35 MPaAS 1012.9 basis, Forspec R&D
- Flexural, 28 days
- Class F7, 8 MPaAS 1012.11 basis, Forspec R&D
Results as stated in the data sheet, TDS-LEVELX · Revision 2 · 12 August 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
LEVEL X questions
How much LEVEL X do I need?
About 1.7 kg of powder per m² per mm of thickness. A 20 kg bag covers about 7.8 m² at 1.5 mm, 2.3 m² at 5 mm and 1.2 m² at 10 mm. Coverage is theoretical, so allow for wastage.
Can LEVEL X be pumped?
Yes. It suits continuous forced-action mixing pumps on large areas. Confirm pump settings with a trial mix, keep water dosing consistent and never exceed the stated water range.
Do I need a primer under LEVEL X?
Yes, priming is mandatory. Use ACTFLEX 300 on dry substrates (4.5% moisture or less). Use two coats of ACTFLEX EP250, sand-seeded, on higher moisture or green concrete.
How soon can I walk on it?
Foot traffic from 2 hours, topping layers or membranes from 4 hours, and bonded floor coverings from 24 hours, thickness-dependent. Cold or humid conditions extend every time.
Can I leave LEVEL X as the finished floor?
No. It is not a final wear surface. Cover it with tile, vinyl, epoxy or another suitable floor covering, and avoid long exposure before covering.
Can I waterproof over LEVEL X?
Yes. Where the floor needs waterproofing, apply a compliant FORSPEC membrane over the cured LEVEL X before any finish. Tile over the membrane as its TDS says.
Used with LEVEL X
LEVEL 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 LEVEL X.