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PRODUCT DATA SHEET
Sika° MB
Solvent Free, Epoxy Moisture Barrier
PRODUCT DESCRIPTION
Sika® MB is a 2-component, solvent free, low viscosity,
epoxy for use under wood flooring products, self leveling
underlayments, floating floors and other flooring
systems that require protection from subfloor moisture.
USES
• Moisture barrier to help control moisture propagation
in cementitious substrates with a moisture content not
exceeding 6 % by Tramex Method, residual moisture
up to 100 % R.H. or 25 Ib/1,000 ft2/24 h (11.4 kg/92.9m
2/24 h)
• For substrate consolidation on concrete, cement and
gypsum screeds
• Adhesion promoter for old and new adhesive residues
in conjunction with other Sika® products
• Suitable on concrete, cement, self -leveling and gypsum
substrates, 05B, plywood, quarry and terrazzo tiles,
water-soluble adhesive and cutbacks
PRODUCT INFORMATION
CHARACTERISTICS / ADVANTAGES
• Solvent -free (100 %solids)
• Easy roller applied application, low viscosity
• Convenient, easy to mix packaging
• Shorter construction periods
• Excellent penetration and stabilization of the substrate
• Reduction of adhesive consumption
• Suitable for use on floors with radiant heating
• Compatible with Sika Bond® wood flooring adhesives,
Sika® Level products
• Can be used below floating floors
APPROVALS/STANDARDS
• Meets ASTM F 3010
Chemical Base
Two component epoxy
Packaging
2.64 gal (10 L) pail
Color
Blue
Shelf Life
24 months from date of production if stored properly in undamaged sealed
containers
Storage Conditions
Store dry at 50-77 •F (10-25 •C). Protect from moisture.
Density
69 Ib/ft3 (1.1 kg/1)
TECHNICAL INFORMATION
Product Data Sheet
Sika• MB
June 2019, Version 01.04
020512091000000017
1/4
Shore D Hardness 7 days 83 (mixed A&B) (ASTM D-2240)
Compressive Strength 7 days 10,000 psi (69 MPa) 73'F (23'C)
50 % R.H.
Permeability to Water Vapor 0.06 g/m2-24hour-mmHG (ASTM E-96)
Service Temperature-40-158'F (-40-70 `C)
APPLICATION INFORMATION
Coverage Coverage per pail
Moisture barrier 250-300 ft2 (23.2-27.9 m2)
Adhesion promoter or 400-450 ft2 (37.2-41.8 m2)
surface consolidator
(coverage figures do not include allowance for surface profile and porosity or material waste).
Application Recommended Results in
Coatings
Moisture barrier only min. 1 Mirror like finish
Substrate min. 1 Good penetration
consolidation only
Adhesion promotion min. 1 Mirror like finish
only
Moisture barrier+ min. 2 Mirror like finish
substrate consolidation
Moisture barrier+ min. 2 Mirror like finish
adhesion promotion
MUST produce a monolithic, pinhole -free finish with a continuous film. The
need for multiple coats is directly related to surface absorption.
Pot Life 507 (10'C) - 60 minutes
68'F (20'C) - 30 minutes
86'F (30'C) -15 minutes
Cure Time 507 (10'C) 18 hours
737 (23'C) 8 hours
867 (30'C) 6 hours
*minimum curing time, prior to walking on primer/or for applying SikaBond' or Slka' Level,
Application Time Overcoating Application Minimum Maximum
Time Window*
Sika® MB 8 hours 36 hours
(2nd coat)
r When Sika• MB is left an the substrate for more than the maximum allowable open time, the surface must
be mechanically prepared (i.e. sanded) solvent wiped before proceeding.
Product Data Shea
Sika• MB
June 2019, Version 01.04
020512081000000017
2/4
BUILDING TRUST
APPLICATION INSTRUCTIONS
SUBSTRATE PREPARATION
• 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 achevie 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. (Le. 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.
MIXING
• 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.
APPLICATION METHOD / TOOLS
• Apply Sika® MB uniformly (in 2 directions 90•) to the
substrate using a medium nap roller, ensuring that a
continuous coat is achieved over the entire surface
(MUST produce a mirror like finish).
• Pour contents of pail onto the floor for best working
time. Attempting to work from the pail will reduce
working time.
• When used as a moisture barrier and substrate
consolidation / adhesion promotor, prepare the
Product Data Sheet
Sika- MB
June 2019, Version 01.04
020512081000000017
3/4
substrate mechanically as in accordance with the
guidelines stated in subtitle "Surface Preparation".
Apply the first coat at 10 mils Apply the second coat at
15 mils in accordance with the open time*.
2 coats application: Apply the first coat at 75-115 ft2/gal
Apply the second coat at 150-225 ft2/gal in accordance
with the application time window*. Then follow one of
the option:
• Option 1• Broadcast to refusal with oven dried silica
sand (20/30) on the second coat immediately. Sweep
sand once the epoxy is cured. Apply Sika® Level
Products on cured epoxy.
• Option 2: Apply Sika® Level-02 EZ Primer in accordance
with the application time window*. When the primer is
dry, apply Sika® Level products.
*ref. to appliction time in sections above
CLEANING OF TOOLS
• Clean all tools and application equipment with cleaning
solvent (Xylene, MEK are effective).
• Hardened/cured material can only be removed
mechanically.
LIMITATIONS
• Proper coverage must be used to achieve moisture
barrier properties.
• Will not act as a moisture barrier for gypsum screeds.
Gypsum based subfloors are very susceptible to excess
moisture and will be degraded if exposed to excess
moisture from below or above.
• Only protects from moisture coming from below the
concrete.
• Will not prevent hydrostatic pressure.
• Must not be applied to a visibly wet substrate.
• Does not prevent moisture occurring between the
epoxy and the floating floor due to secondary sources
of moisture or acclimation, e.g, water condensation.
• Is not suitable for use with bonded systems due to
Possible curing and adhesion problems.
• Sika* recommends the use of Sika- Level products on
top of it.
• Floor covering manufacturer's and Wood flooring
manufacturer's recommendations, like room humidity
levels and wood acclimation requirements should be
strictly followed.
Sika' does not make any standing recommendations as
to the structural integrity of old adhesive residues or
subflooring materials that are not manufactured by
Sika*.
When left on the substrate for more than the
maximum allowable open time of 36 hours, prior to
placing the adhesive, the surface must be thoroughly
cleaned and mechanically prepared (i.e. screened
sand) and solvent wiped. Failure to do this, may result
in adhesion problems. For detailed instruction contact
our Technical Service. When used in conjunction with
SIkaBond•, Sika® MB does not need to be broadcasted
with sand.
On.
BUILDING TRUST
BASIS OF PRODUCT DATA
LEGAL DISCLAIMER
Results may differ based upon statistical variations
depending upon mixing methods and equipment,
temperature, application methods, test methods, actual
site conditions and curing conditions.
OTHER RESTRICTIONS
See Legal Disclaimer.
ENVIRONMENTAL, HEALTH AND SAFETY
For further information and advice regarding
transportation, handling, storage and disposal of
chemical products, user should refer to the actual Safety
Data Sheets containing physical, environmental,
toxicological and other safety related data. User must
read the current actual Safety Data Sheets before using
any products. In case of an emergency, call CHEMTREC
at 1-800-424-9300, International 703-527-3887.
Slice Corporation
Sika Mexican S.A. de Cv.
201 Polito Avenue
Carretera Libre Celaya Km. 8.5
Lyndhurst, NJ 07071
Fracc. Industrial Baivanera
Phone:+1-800-933-7452
Corregidora, Queretaro
Fax:+1-201-933-6225
C.P. 76920
usa.sika.com
Phone: 52 442 2385800
Fax: 52 442 2250537
WNeww,a�
-4-K
Product Data Sheet
Sika• MB
June 2019, Version 01.04
020512081000000017
4/4
• KEEP CONTAINER TIGHTLY CLOSED
• KEEP OUT OF REACH OF CHILDREN
• NOT FOR INTERNAL CONSUMPTION
• FOR INDUSTRIAL USE ONLY
• FOR PROFESSIONAL USE ONLY
Prior to each use of any product of Sika Corporation, its
subsidiaries or affiliates ("SIKA"), the user must always
read and follow the warnings and instructions on the
product's most current product label, Product Data
Sheet and Safety Data Sheet which are available at
usa.sika.com or by calling SIKA's Technical Service
Department at 1-800-933-7452. Nothing contained in
any SIKA literature or materials relieves the user of the
obligation to read and follow the warnings and
instructions for each SIKA product as set forth in the
current product label, Product Data Sheet and Safety
Data Sheet prior to use of the SIKA product.
SIKA warrants this product for one year from date of
installation to be free from manufacturing defects and
to meet the technical properties on the current Product
Data Sheet if used as directed within the product's shelf
life. User determines suitability of product for intended
use and assumes all risks. User's and/or buyers sole
remedy shall be limited to the purchase price or
replacement of this product exclusive of any labor costs.
NO OTHER WARRANTIES EXPRESS OR IMPLIED SHALL
APPLY INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. SIKA SHALL NOT BE LIABLE UNDER ANY LEGAL
THEORY FOR SPECIAL OR CONSEQUENTIAL DAMAGES.
SIKA SHALL NOT BE RESPONSIBLE FOR THE USE OF THIS
PRODUCT IN A MANNER TO INFRINGE ON ANY PATENT
OR ANY OTHER INTELLECTUAL PROPERTY RIGHTS HELD
BY OTHERS.
Sale of SIKA products are subject to the Terms and
Conditions of Sale which are available at
https://usa.sika-com/en/group/SikaCorp/termsandconditions.html
or by calling 1-800-933-7452.
SIkaMB-en-US-(06-2019)-1-4.pdf
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BUILDING TRUST