Sika MB Epoxy Moisture Barrier 2.6 Gallons
$285.99
Stock#: 401521 | UPC#: 338861363720
Sold by the Bucket | Online Sale Only
- Solvent-free (100 % solids)
- Easy roller applied application, low viscosity
- Convenient, easy-to-mix packaging
SikaTile MB
Looking for a high-performance solution to protect your floors from subfloor moisture? Try Sika® Moisture Barrier - the solvent-free, 2-component epoxy that offers low viscosity and exceptional performance. Perfect for use with wood flooring products, floating floors, self-leveling underlayments, and other flooring systems, Sika® MB is the ideal solution for anyone looking for a reliable moisture barrier that delivers outstanding results.
Usage
- 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 lb/1,000 ft2/24 h (11.4 kg/92.9m2/24 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, OSB, plywood, quarry and terrazzo tiles, water-soluble adhesive, and cutbacks
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 SikaBond® wood flooring adhesives, Sika® Level products
- Can be used below floating floors
Sustainability | Certifications | Approvals
APPROVALS / STANDARDS
- Meets ASTM F 3010
Product Information
Chemical Base
Two-component epoxy
Shelf Life
24 months from the 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 lb/ft3 (1.1 kg/l)
Technical Information
Shore D Hardness
| 7 days | 83 (mixed A&B) |
Compressive Strength
| 7 days | 10,000 psi (69 MPa) |
Permeability to Water Vapor
| 0.06 g/m2-24hour-mmHG | (ASTM E-96) |
Service Temperature
-40–158 °F (-40–70 °C)
Application
Pot Life
| 50 °F (10 °C) | ~ 60 minutes |
| 68 °F (20 °C) | ~ 30 minutes |
| 86 °F (30 °C) | ~ 15 minutes |
Cure Time
| 50 °F (10 °C) | 18 hours |
| 73 °F (23 °C) | 8 hours |
| 86 °F (30 °C) | 6 hours |
* Minimum curing time, prior to walking on primer/or for applying SikaBond® or Sika® Level.
Application Time
| Overcoating Application Time Window* | Minimum | Maximum |
| Sika® MB
(2nd coat) |
8 hours | 36 hours |
* When Sika® MB is left on the substrate for more than the maximum allowable open time, the surface must be mechanically prepared (i.e. sanded) solvent wiped before proceeding.
Application Steps
SUBSTRATE PREPARATION
All surfaces must be between 40º F (4º C) to 90º F (32º C) and structurally sound (deflection not to exceed 1⁄360 of the span), dry, clean, and free from oil, grease, wax, paint, old adhesives, sealers, and curing compounds.
Any contaminates which inhibit proper bonds must be removed.
Substrate preparation should be completed following ANSI A108 AN-2 “General Requirements for Sub-surfaces”.
All substrates should be plumb and true, surface deviation should not exceed 1⁄4" in 10’.
Patching, leveling, or areas requiring a mortar bed should be prepared using SikaLevel® Underlayments. Movement (Expansion) joints should be provided to comply with TCNA method EJ171.
Concrete must be free of any negative hydrostatic pressure and/or excessive moisture.
Consumption
Coverage:
| Coverage per pail | |
| Moisture barrier | 250–300 ft2 (23.2–27.9 m2) |
| Adhesion promoter or
surface consolidator |
400–450 ft2 (37.2–41.8 m2) |
(Coverage figures do not include allowance for surface profile and porosity or material waste).
| Application | Recommended
Coatings |
Results in |
| Moisture barrier only | min. 1 | Mirror-like finish |
| Substrate
consolidation only |
min. 1 | Good penetration |
| Adhesion promotion only | min. 1 | Mirror-like finish |
| Moisture barrier +
substrate consolidation |
min. 2 | Mirror-like finish |
| Moisture barrier +
adhesion promotion |
min. 2 | Mirror-like finish |
MUST produce a monolithic, pinhole-free finish with a continuous film. The need for multiple coats is directly related to surface absorption.
Application Steps
SUBSTRATE PREPARATION
- The 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.
- The substrate must have an open textured surface to allow Sika® MB to penetrate. (i.e. Blast cleaning and 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 cutbacks 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 instructions.
- 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 the 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 the 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 the sides of the pail with a paint stick or paddle to ensure all contents are thoroughly mixed together.
- Unmixed material applied to the floor will not cure properly.
CLEANING OF TOOLS
- Clean all tools and application equipment with cleaning solvent (Xylene and MEK are effective).
- Hardened/cured material can only be removed mechanically.
Packaging:
Sold As: Bucket (2.64 Gallons)
Weight Per Bag: 50 Pounds
Shipped Via: UPS Ground / LTL Delivery
Additional information
| Weight | 50 lbs |
|---|---|
| Dimensions | 24 × 12 × 12 in |
| Brand | Sika |
| Installation Method | Applied with Paint Roller, Pour Directly on the Sub-Floor |
| Product Type | Moisture Barrier, Moisture Guard |
| Project | Substrate Prep |
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