Sika® MB

LEED V4.1 California Department of Public Health (CDPH) Standard Method v1.2: Private Office, School Classroom, and Residential

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)

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

-40°F (-40°C) to 158°F (70°C)

50°F (10°C) min. / 86°F (30°C) max.

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 should be between 50°F and 86°F (10°C and 30°C). 

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

Times are approximate and will be affected by changes in ambient conditions, particularly temperature and relative humidity.

These are estimated coverages and additional material may be required based on substrate porosity/profile, material wastage or any other variations.

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 (0.8 MPa).

Substrate must be clean, dry, sound, 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 3-4.
• 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.
• Repair with Sika® Level 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. Dormant hairline cracks can be covered with an appropriate Sika flexible sealing compound. Once the dormant cracks and dormant joints have been properly filled, broadcast sand to refusal, and allow these areas to cure thoroughly. Remove all excess sand before proceeding with the Sika® MB installation.
• 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 A to one full can of Part B 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 shall 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.

Apply Sika® MB uniformly (crosswise) to the substrate using a 3/8” nap roller, ensuring that a monolithic coat is achieved over the entire surface.

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