Sika Level-425 self-leveling underlayment bag
  • Self-leveling underlayment being poured across a concrete slab
Floor Prep

Sika Level-425

Highly fluid cement-based self-leveling underlayment for new and renovated interior floors

Performance at a glance

Construction
Cement-based self-leveling underlayment
Installation
Poured as a highly fluid self-leveler, interior only

View full specifications

Construction
Cement-based self-leveling underlayment
Installation
Poured as a highly fluid self-leveler, interior only
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Availability and lead times are confirmed by your Yorkshore representative.

Overview

Sika Level-425 is the highly fluid, cement-based self-leveling underlayment in the Level line, poured across new floors and renovations where the whole area needs to be brought flat before a resilient, textile or hard floor covering. It finds its own surface and holds it, and is for interior use only.

In Yorkshore's four-step sequence it is the pour: prime with Level-01 Primer Plus or Level-02 EZ, patch local defects with Level-025, pour Level-425, then skim with Level SkimCoat. Sika publishes the technical data sheet and fact sheet linked below; thickness range, compressive strength, working time and coverage are stated there rather than on yorkshore.com. Send the moisture readings and the flatness survey and your account executive returns the matched system, coverage math and current data sheets for the submittal.

Specifications

Download specifications
Values from manufacturer documentation. Confirm current data on the technical data sheet before specifying.
Property Value
Construction and format
ConstructionCement-based self-leveling underlayment
InstallationPoured as a highly fluid self-leveler, interior only
Performance and specification data
Type Highly fluid, cement-based self-leveling underlayment
Use New floors and renovations; interior only

Documents and certifications

  • Sika Level-01 Primer Plus jug

    Floor Prep

    Sika Level-01 Primer Plus

    Penetrating primer that stops outgassing and water loss from the pour, step one of the Sika Level sequence

    • Construction Penetrating primer
    • Installation Applied to the substrate before the self-leveling pour
  • Sika Level-025 Patch bag

    Floor Prep

    Sika Level-025 Patch

    Cement-based patch for concrete and plywood, 1/16 in. to 1/2 in., ahead of the floor covering

    • Construction Cement-based patching compound
    • Installation Patching and smoothing before the floor covering, 1/16 in. to 1/2 in.
  • Sika Level SkimCoat bag

    Floor Prep

    Sika Level SkimCoat

    Fast-setting cement-based skim coat that smooths over substrates and stable adhesive residue

    • Construction Fast-setting cement-based skim coat
    • Installation Applied as a skim coat over the substrate or stable adhesive residue before the covering
  • Schönox ZM self-leveling compound bag

    Floor Prep

    Schönox ZM

    Very low emission, low-shrinkage cementitious self-leveler for all suitable substrates, 1 to 15 mm, A1fl

    • Reaction to fire A1 / A1fl
    • Layer thickness 1.0–15 mm neat; 10–25 mm with aggregate
  • Flooring backings with EnviroSTIX adhesive pre-applied at the factory

    Floor Prep

    EnviroSTIX Classic

    Pre-applied peel-and-bond adhesive on the flooring backing, 0 g/L VOC, rated to 96% RH with ES-P primer, 10-year limited warranty

    • Adhesive thickness 5–7 mil
    • Warranty 10-year limited

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