Keratrade SL45 20kg Self-Levelling Compound

Keratrade SL45 20kg Self-Levelling Compound

High-flow, cementitious self-levelling underlayment for smoothing uneven internal substrates from 1 to 45 mm, creating a strong, durable surface for vinyl, engineered timber, ceramic and natural stone floor coverings. Made with premium cements, graded aggregates and functional additives – low shrinkage and crack resistant. It is an underlayment, not a finished floor and not a moisture barrier.

Key Features

• Low shrinkage, crack resistance
• High flow, self-smoothing from 1 to 45 mm
• Walkable in 4–6 hours @ 23°C
• Ready for floor coverings in 18–24 hours

Technical Specifications

• Uses: Internal only
• Binder: Cement-based
• Thickness: 1–45 mm
• Water: 4.4–5 L per 20 kg bag
• Coverage: ≈ 1.1 m² @ 10 mm per 20 kg bag
• Pot life: ≈ 20 min
• Open time: 15–20 min
• Foot traffic: 4–6 hrs
• Ready for floor coverings: 18–24 hrs
• Compressive strength: 30 MPa (28 days)
• Flexural strength: 5 MPa (28 days)
• Tensile bond strength: > 1.5 MPa
• Application temperature: 5–35 °C (recommended 10–30 °C)
• Clean up: Water
• Shelf life: 12 months, dry and unopened
• Pack: 20 kg

Areas of Use

Internal floors only. Levelling and smoothing uneven subfloors to a flat, durable surface before floor coverings are installed. Domestic, commercial, light industrial, and retail and hospitality fit-out.

Suitable Substrates

• Absorbent and non-absorbent concrete
• Cementitious mortar screeds
• Impervious polished concrete
• Well-bonded ceramic and porcelain tile, and terrazzo
• Gypsum and anhydrite screeds
• Exterior-grade plywood, OSB and suitable timber subfloors
• Prepared metal, subject to BuildGreen technical approval

All substrates require priming. Prime absorbent concrete and cement screeds with Keraprime One; plywood, OSB, timber and metal with Keragrip Eco; gypsum and anhydrite substrates with Active Prime Fix; and polished concrete, tile, terrazzo and epoxy residues with Keragrip Eco or Active Prime Fix after mechanical preparation. Where moisture control is required, use the KeraSHIELD A+B epoxy moisture barrier. New concrete must be fully cured for 28 days and treated for hydrostatic moisture, rising damp or construction moisture before installation.

Floor Coverings Laid Over SL45

LVT/LVP, VCT and sheet vinyl; rubber and linoleum; engineered timber, parquet and laminate; ceramic, porcelain and large-format tile; natural stone; carpet and carpet tile.

Coverage per 20 kg Bag

• 1 mm ≈ 11.4 m²
• 3 mm ≈ 3.8 m²
• 6 mm ≈ 1.9 m²
• 10 mm ≈ 1.1 m²
• 20 mm ≈ 0.57 m²
• 30 mm ≈ 0.38 m²
• 45 mm ≈ 0.25 m²

Consumption ≈ 1.75 kg/m² per mm. Theoretical estimating values only – they exclude substrate profile, wastage and installation losses.

Do Not Use

• Externally, or in any area not fully protected from weather.
• As a permanent exposed wearing surface, unless specifically approved by BuildGreen as part of a tested finishing system.
• On sloped or ramped surfaces that require drainage.
• Over unstable subfloors – maximum deflection L/360.
• Over loosely bonded existing tile or resilient flooring.
• On unprimed metal, or any substrate not primed as specified.
• Where ambient temperature is outside 5–35 °C during application or the first 24 hours of curing.

Mixing

Pour 4.4–5 L of cool, clean water per 20 kg bag into a clean mixing container, slowly add the powder while mixing with a heavy-duty electric drill and paddle, and mix for 3 to 5 minutes until completely lump-free and uniform. Avoid overmixing, and do not add more water than specified. Keep ambient, subfloor and mixing-water temperature between 10 °C and 30 °C.

Item Code: SL45-20KG.