Sika® MB

LEED v4.1 & LEED v5 California Department of Public Health (CDPH) Standard Method v1.2

Meets ASTM F3010

Epoxy resin

24 months from the date of production if stored properly

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions and protected from direct sunlight at temperatures between 50°F and 77°F (10°C and 25°C).

Condition material between 65°F and 75°F (18°C and 24°C) before using.

~9.18 lbs/gal (~1.10 kg/L) at 68°F (20°C) (mixed resin)

Note: MUST produce a monolithic, pinhole-free finish with a continuous film. The need for multiple coats is directly related to surface absorption.

Treat Sika® MB as a non-porous substrate. For wet and semi-wet adhesive installations, SikaLevel®-02 EZ Primer must be used and the surface smoothened with a suitable leveling compound prior to the use of pressure-sensitive resilient flooring adhesives.

-40°F to 158°F (-40°C to 70°C)

50°F to 86°F (10°C to 30°C)

85% RH max. (during application and curing)

Beware of condensation!

The substrate must be at least 5°F (3°C) above measured dew point to reduce the risk of condensation on the surface of the applied product.

During laying and until Sika® MB has fully cured, the substrate temperature must be between 50°F and 86°F (10°C and 30°C). 

Prior to walking on primer/or for applying SikaBond® or SikaLevel® allow:

These are estimated coverages and additional material may be required based on substrate porosity/profile, material wastage or any other variations. Apply material to a test area to calculate the exact coverage for the specific substrate conditions.

The substrate must be sound and of sufficient compressive strength (minimum 1,160 psi (8 MPa)) with a minimum pull-off strength of 116 psi (0.80 MPa).

Substrate must be clean, dry, stable, homogeneous and even, free of all contaminants such as oil, grease, dust and loose or friable particles. Paint, wax, curing and sealing compounds, laitance and other poorly adhering contents that will interfere with the adhesion of Sika® MB must be mechanically removed. 

Note: Before overall installation begins, Sika  recommends the application of several small test patches to determine primer application requirements and acceptability of final product performance.

• All substrate must have an open-textured surface to allow Sika® MB to penetrate the surface (i.e. blast cleaning, grinding are considered acceptable means to achieve the desired surface profile. Acid and chemical etching are NOT acceptable).
• Concrete substrate must have a concrete surface profile of CSP 2–4.
• At least 50% of the surface area must be cleared of residual adhesive and cutbacks (i.e. by grinding or mechanical substrate preparation).
• Old cutback can contain asbestos which is dangerous for the health so do not grind, sand or blast. Refer to the Resilient Floor Covering Institute’s publication “recommended work practice for removal of resilient floor coverings” for instruction.
• Weak surfaces must be removed. Repair with SikaLevel® SkimCoat before priming.
• On fiber reinforced concrete, fibers should be flamed off the surface prior to application of Sika® MB as a moisture barrier.
• All moving joints and moving cracks must be honored up through the floor preparation and floor covering installation, finishing with an appropriate Sika flexible sealing compound. Dormant hairline cracks can be covered with Sika® MB. Dormant joints and dormant cracks greater than a hairline that will not be honored must be pre-filled in strict accordance with the installation instructions provided by the Sika Technical Service Department.
• Due to differences in asphalt-based adhesive types and performance capabilities, installer must verify that preparation of the surface is sufficient prior to using Sika® MB. For unknown substrates, please contact Sika’s Technical Services for best practices at 1-800-933-SIKA.
• All dust, loose and friable material must be completely removed and cleaned with an industrial vacuum from all surfaces before application of the product.

• Add one full can of Part B to one full can of Part A then mix with an electric drill and mixing paddle (Jiffy Mixer type) at a low speed to reduce air entrainment (300–400 rpm). Using a paint stick or similar is NOT sufficient to mix the primer.
• A minimum mixing time of 3 minutes shall be observed; mixing must continue until a homogeneous mix has been achieved.
• Scrape sides of pail with paint stick or paddle to ensure all contents are thoroughly mixed together.
• Unmixed material applied to the floor will not cure properly.

Clean all tools and application equipment with cleaning solvent (Xylene, MEK or other similar solvent) immediately after use. Hardened/cured material can only be removed mechanically.