Self-Levelling Compound

Floor K300 - Self-Levelling Compound

Quick-hardening polymer-modified self-levelling compound — 3 to 40mm, walkable in 4 hours, tilable in 24 hours, UNI EN 13813 CT-C30-F5

Floor K300 is a self-levelling compound from Licata — a quick-hardening, polymer-modified cement mortar with controlled hygrometric shrinkage. Applied at 3 to 40mm in a single pour, this self-levelling compound can be walked on after just 4 hours and tiled over after 24 hours. Near-zero shrinkage minimises cracking throughout all life phases. Suitable for ceramic tiles, rubber, stone, parquet, carpet and resin finishes.

⬇ Download Technical Data Sheet ⬇ Download Safety Data Sheet Make an Enquiry

Certified UNI EN 13813 — CT-C30-F5 Walkable in 4 Hours Tilable in 24 Hours 3–40mm Single Pour Near-Zero Shrinkage

Product Type Self-Levelling Compound

Thickness 3–40mm

Walkable 4 hours

Tilable 24 hours

Packaging 25kg bags

Features & Benefits

Why specify Floor K300 self-levelling compound?

📐

3 to 40mm in a Single Pour

Unlike most self-levelling compounds limited to 10mm, Floor K300 can be applied at variable thicknesses from 3 to 40mm in a single application — ideal for levelling out uneven substrates without multiple pour cycles or expensive screeds.

⚡

Walkable in 4 Hours

This self-levelling compound can be walked on after just 4 hours at 20°C — significantly faster than traditional cement screeds and minimising project downtime between floor preparation and finish installation.

🏅

UNI EN 13813 — CT-C30-F5

Certified to UNI EN 13813 performance classes CT-C30-F5 — compression resistance C30 and bending strength F5. This self-levelling compound meets the structural requirements for use under all common floor finishes.

📏

Near-Zero Shrinkage

Controlled hygrometric shrinkage of less than 0.25mm/m virtually eliminates cracking throughout all phases — application, plastic phase and curing. Critical for large-area pours where conventional compounds frequently crack.

⏱️

Extended 20-Minute Pot Life

Latest-generation additives give this self-levelling compound a pot life approximately 20 minutes longer than standard products — allowing larger areas to be covered in a single mix without rushing the pour or risking premature setting.

💪

High Adhesion — >1.5 MPa

Polymer-modified formulation achieves adhesion values above 1.5 MPa — this self-levelling compound bonds reliably to existing cement substrates and provides a stable, high-strength base for all floor finish types.

Product Description

Floor K300 — Quick-Hardening Self-Levelling Compound

Floor K300 is Licata's quick-hardening self-levelling compound — a polymer-modified cement mortar with controlled hygrometric shrinkage, manufactured with high-resistance hydraulic binders, spherical quartz aggregates, special additives and HT fibres. Developed in Licata's R&D laboratories, it stands out for its easy workability, excellent self-levelling properties, superior mechanical and surface strength and near-zero shrinkage.

This self-levelling compound is certified to UNI EN 13813 classes CT-C30-F5 and can be applied at any thickness from 3 to 40mm in a single pour — eliminating the need for multiple applications on heavily uneven substrates. It is suitable for internal and external applications on existing firm cement substrates.

Certification

UNI EN 13813 — CT-C30-F5 · Reaction to fire: A1 · Shrinkage <0.25mm/m · Adhesion >1.5 MPa

Hardening Timeline

20 min

Setting begins

Workability window closes — do not disturb after this point

4 hrs

Walkable

Light foot traffic permitted — no heavy loads

24 hrs

Tilable

Subject to residual humidity check before laying floor finish

28 days

Full strength

Full mechanical resistance achieved — C30/F5 performance

Compatible Floor Finishes

What can be laid over this self-levelling compound?

Ceramic and porcelain tiles

Rubber flooring

Natural stone

Parquet and engineered timber

Fitted carpet

Resin flooring systems

Substrate Compatibility

Suitable over existing firm cement substrates indoors and outdoors. For compact concrete, anhydrite, magnesium-based concrete, old ceramics, marble, stone or parquet — contact our technical team before use.

Not Suitable For

Substrates subject to bending. Do not apply over substrates with a film of water on the surface, completely dry substrates, or in extreme conditions (midday sun exposure or frozen substrates).

Technical Data

Floor K300 self-levelling compound — technical specification

AppearanceGrey powder

Particle size<0.5mm

Consumption16–17 kg/m² per 10mm

Mixing water5.25–5.75L per 25kg (21–23%)

Workability at 20°C≈20 minutes

Application thickness3–40mm (single pour)

Application temperature+5°C to +35°C

Walkable4 hours

Tilable24 hours (subject to humidity check)

Full strength28 days

Packaging25kg bags

Shelf life8 months (sealed, cool dry store)

Compression resistanceC30 (UNI EN 13813)

Bending strengthF5 (UNI EN 13813)

Shrinkage<0.25mm/m

Reaction to fireA1

Preparation

Preparing for self-levelling compound application

Clean the substrate: Remove all flaking parts, dust, oils, greases, waxes, gypsum and salt. Repair any cracks or gaps with Repair 450 or Repair 250 before applying this self-levelling compound.

Rising damp: Install a vapour barrier if rising damp is present — do not apply this self-levelling compound directly over a damp substrate without protection.

Saturate to SSD: Wet the substrate with water until saturated surface dry (SSD) conditions are reached — this prevents the dry substrate absorbing mixing water from the self-levelling compound and weakening adhesion.

Porous substrates: Treat particularly porous or absorbent surfaces with Aggrappante LG primer before applying this self-levelling compound.

Mixing & Application

Pouring the self-levelling compound

Mixing: Add 5.25–5.75 litres of clean water per 25kg bag to a container with ¾ of the water. Mix at low speed for 3 minutes until a fluid, lump-free mixture is achieved. Do not split bags for partial mixes.

Pour continuously: Pour the self-levelling compound continuously at the required thickness of 3–40mm and spread using a trowel or squeegee. Work quickly — pot life is approximately 20 minutes.

Thin applications: For thicknesses between 3 and 10mm, use an air bubble removal roller immediately after pouring to eliminate voids and ensure a flat surface.

Curing: Protect from direct sunlight, strong wind and heavy rain for at least 24 hours. Check residual humidity before laying any floor finish — do not tile before 24 hours have elapsed.

Do not add water or powder to the mixed product. Only 20 minutes pot life — mix only what can be poured immediately. Do not apply on substrates subject to bending, or in extreme temperature conditions.

Buy Floor K300 self-levelling compound

Available from all six Licata branches across the UK. Supplied in 25kg bags. Speak to our team about pricing and technical support.

Make an Enquiry Download TDS