Sika® MB

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

• Meets ASTM F3010

Two component epoxy

24 months from date of production if stored properly in undamaged sealed containers

Store dry at 50–77 °F (10–25 °C). Protect from moisture.

69 lb/ft³ (1.1 kg/l)

-40–158 °F (-40–70 °C)

* Minimum curing time, prior to walking on primer/or for applying SikaBond^® or Sika^® Level.

(Coverage figures do not include allowance for surface profile and porosity or material waste).

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

• Substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust, and loose or friable particles. Paint, laitance, and other poorly adhering contents must be mechanically removed.
• Substrate must have an open textured surface to allow Sika® MB to penetrate. (i.e. Blast cleaning, grinding are considered acceptable means to achieve the desired surface profile. Acid and chemical etching are not acceptable).
• 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.
• Minimum substrate compressive strength > 1,160 psi. Tensile Bond strength > 116 psi at the time Sika® MB is applied.
• Repair with Sika^® Level SkimCoat or SikaQuick^® mortar before priming.
• The floor must be cleaned with an industrial vacuum prior to installation of the Sika® MB.
• On fiber reinforced concrete, fibers should be flamed off the surface prior to application of Sika® MB as a moisture barrier.
• 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 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 with Sika Loadfix-524 in strict accordance with the installation instructions provided by the Sika Technical Service Department and covered with Sika MB within 24 hours. 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.

• Add one full can of component A to one full can of component B then mix with an electric drill and mixing (Jiffy Mixer type) paddle 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.

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