0.5 gal. (2 L) and 2 gal. (7.57 L) units.

Sika® Level-02 Primer
Epoxy primer for use on difficult-to-adhere-to substrates beneath SikaLevel underlayments


Sika® Level-02 Primer is a two-part, water-dispersed and solvent-free, epoxy resin based solution used to prime typically problematic or smooth floor surfaces prior to the application of Sika® Level underlayments.

Where to Use

As a primer for difficult to adhere to substrates including securely bonded and correctly prepared ceramic and vinyl based or quarry tiles, engineer approved wooden subfloors, epoxy terrazzo and old, thin section cut back adhesive. Specifically designed as an adhesion promoter for Sika® Level underlayments, enhancing the bond and integrity when applied onto problematic substrates.


  • Ready to mix, pre-proportioned components.
  • Easy to use 1:1 by volume, resin to hardener ratio.
  • Water-based and solvent-free; user friendly.
  • Prevents water loss from the underlayment into substrate on absorbent subfloors.
  • Extended pot life and open time to permit longer working and overlay times.
  • Achieves good bond values, even on nonporous and smooth surfaces.
  • Effectively adheres cement underlays in a single, highly productive operation.


200 to 366 ft²/US gal (5.0 - 9.0 m²/ltr) per coat approx. Coverage figures are for estimating purposes and do not include allowance for surface profile or material waste. Actual coverage may vary depending upon substrate conditions, application technique, and thickness applied.

How to Use

Surface Preparation

The substrate must be dry, clean and stable before priming and applying the primer and subsequent underlayment. Remove all existing substances which will interfere with the adhesion of the primer, such as coatings, sealers, wax, latex compounds, impregnations and curing agents, together with all contaminants i.e. dirt, dust, laitance, grease, oils, and foreign matter. All wooden subfloors, including plywood, must be engineer-approved, structurally stable, sound and solid. Prepare substrates by mechanical means, such as shot blasting, scarifying or other appropriate methods to achieve an open-textured, fine-gripping surface (ICRI - CSP3 minimum). Weak substrate material should be removed and surface defects such as spalls, cracks, crevices and blemishes fully exposed and repaired with SikaQuick ®1000 or Sika ®Level SkimCoat mortars (dependent upon depth of defects) prior to priming and levelling. Consult Sika Technical Sales for recommendations. All loose, friable material, including preparation residue, must be completely removed using a vacuum before application of the Sika ®Level-02 Primer. The compressive strength of the substrate should be at least > 2900 psi (20 MPa) at 28 days with a minimum tensile strength of > 145 psi (1.0 MPa) at the time Sika Level-02 Primer is applied. Moisture Vapor Emission Rates of the substrate should comply and meet the requirements of the proposed floor covering. Please consult the manufacturer of the final floor finish for advice. In circumstances involving the installation of an underlayment over plywood subfloors, ensure that the subfloor consists of at least two layers of exterior grade plywood, a minimum of 1 ¼ inch (3.2 cm) in thickness and meets, as a minimum, the deflection parameters of L/360 (live and dead loads taken into consideration. The plywood must then be suitably secured, bonded and prepared to a contaminant free and sound condition. Refer to the manufacturer of the final floor covering with regard to the deflection requirements of the floor finish system. Before overall installation begins, Sika recommends the application of several small test patches to determine primer application requirements and acceptability of final product performance. In general, a one-coat applica-tion of the Sika ®Level-02 Primer should be sufficient; however, allowance should be made for double priming on excessively porous or rough substrates. Where multiple coats are required, do not apply excessive material.


Thoroughly pre-stir each component separately to ensure that all solids are evenly distributed and even consistencies are produced. Mix Component A and Component B together in the correct ratio in a clean pail for at least 3 minutes using a low-speed drill with an Exomixer type mixing paddle at 300-450 rpm to minimise air entrapment. During the mixing operation, scrape down the side and bottom of the vessel with a flat or straight edge trowel at least once to ensure complete mixing. When completely mixed Sika Level-02 Primer should be uniform in color and consistency. Mix only that quantity that can be used within its pot life.


Ensure that both substrate and air temperatures are between 50°F and 86°F (10°C and 30°C) before commencing the application of Sika ®Level-02 Primer. The stated application temperatures are to be achieved before priming and should be maintained for a period of at least 3 days after installation of the primer and underlayment. Should colder conditions prevail, make allowance for the use of indirect and vented heaters to achieve and maintain the application temperature required. Where temperatures exceed 86°F (30°C), refer to and follow ACI hot weather application and protection guidelines. Apply Sika ®Level-02 Primer by pouring onto the prepared floor surface within 20 minutes of mixing, discarding material which is not used within this time. Note: Do not turn the mixing vessel upside down onto the floor as unmixed material may be placed on the floor and result in soft spots. Spread the mixed resin using a short nap roller (long nap roller for rougher surfaces), working the material into the prepared substrate and thoroughly covering all contact surfaces due to receive the underlayment. Typically, one single thin application is required; however, porous substrates may require two thin coats of the primer to effectively cover the surface. Ensure coverage is at most 200 to 366 ft ² /US gal (5 to 9 m ²/ltr) per coat, depending upon the substrate, avoiding heavy, thick applications and removing excess material. Where multiple applications are necessary, due to excessive absorption by the substrate, allow previous coats to become transparent and tacky before applying further primer. When first applied, Sika Level-02 Primer appears milky white; once it is transparent and tacky it is ready for overlaying. This facilitates quality control in terms of complete coverage and clearly confirms when the underlayment can be installed. To ensure proper adhesion, Sika ®Level underlayments are applied within 4 hours of the application of the Sika ®Level-02 Primer, but only once the primer is transparent (without milky spots) but tacky to the touch (typically after a minimum of 1/2 hour drying time under normal environmental conditions). Lower temperatures and/or humid conditions may extend the drying time between priming coats or before installation of the underlayment.

Tooling & Finishing

Apply Sika® Level-01 Primer by brush or roller (long nap roller for rougher surfaces), working the material into the prepared substrate. Typically, one single application is required; however, porous substrates may require two or more coats of primer to effectively seal the surface. Ensure coverage is at most 325 to 500 ft² /US gal, 10 to 12 m² /ltr per coat, depending upon the substrate, but ponding of the primer on the surface must be avoided and puddles must be removed. Where multiple applications are necessary to seal the surface, allow previous coats to become tack-free before applying additional primer. When first applied, Sika Level Primer appears white; once dry, it is clear. This facilitates quality control in terms of complete coverage and clearly confirms when the underlay can be installed. ®


  • For interior use only. Not to be used as a primer for Sikafloor® resins.
  • When using Sika® Level-02 Primer in temperatures over 86°F (30°C), comply with ACI hot weather application guidelines.
  • Do not apply to substrates at temperatures below +(50°F)10°C as this will slow the drying and effectiveness of the primer.
  • Engineer-approved wooden(plywood) subfloors must be at least 1ΒΌ in. (3.2 cm) in thickness and must be properly secured, bonded and prepared and free from contaminants and loose, friable material.
  • Do not apply Sika® Level-02 Primer or Sika® Level underlayments onto chipboard, particle board, hardboard, metal, gypsum or dimensionally unstable substrates.
  • Where substrates exhibit a Moisture Vapor Emission Rate (MVER) of over 5 lbs. per 1,000 ft² (244 g per m²) per 24 hours using a calcium chloride test (ASTM F-1869), pre apply Sikafloor MB Primer. Consult the manufacturer of the final floor covering to identify the maximum permitted MVER and retained moisture content for their product.
  • Do not apply where the relative humidity of the substrate exceeds 75% as this will limit the efficiency of the primer.
  • The substrate should be surface dry with relative humidity of surrounding air low enough to allow efficient drying of the primer.
  • Do not apply Sika® Level-02 Primer onto concrete or cementitious substrates, use Sika Level-01 Primer for such surfaces.
  • Low temperature or high humidity will extend the drying and waiting times before applying the underlayment.
  • Sika® Level-02 Primer does not form a moisture barrier. For proper moisture mitigation, consult Sika Technical Services.
  • Product should not be used if exposed to freezing temperatures.