Product Data Sheet
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Sika® MB EZ Rapid

Sika® MB EZ Rapid

ONE-COMPONENT RAPID-DRYING MOISTURE BARRIER, ADHESION PROMOTER AND SUBSTRATE CONSOLIDATOR FOR FLOORING ON CRITICAL SUBSTRATES

Sika® MB EZ Rapid is a one-component, solvent-free, rapid-drying, polyurethane resin moisture mitigation system applied prior to the installation of floor covering products, self-leveling underlayments, floating floors and other flooring systems.

  • Class II vapor retarder ≥ 0.1 Perm and ≤ 1.0 Perm (2 coats)
  • Excellent adhesion promoter to a wide range of residues
  • Can be used as a vapor retarder in place of felt paper on wooden subfloors for glue assist applications
  • Colored formula to ensure uniform coverage
  • High coverage allows for cost saving
  • Low viscosity offers excellent penetration to highly porous substrates
  • Rapid-drying allows for same-day installation
Product Data Sheet
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Usage

  • Moisture barrier to control moisture vapor emission rates (MVER) in cementitious substrates not exceeding up to 93% RH / 12 #CC as a one-coat system or above 93% RH / 12 lbs. per 1,000 sq.ft. (5.44 kg per 92.90      m2) per 24 hours up to 98% RH / 18 lbs. per 1,000 sq.ft. (8.16 kg per 92.90 m2) per 24 hours as a two-coat system
  • For substrate consolidation on concrete, cement and gypsum screeds
  • Adhesion promoter for old and new adhesive residues in conjunction with other Sika® products
  • For glue assist applications using a single coat in combination with SikaBond®-910 Construction Adhesive
 
  • Suitable on concrete, cement, self-leveling and gypsum substrates, plywood, OSB, water-resistant adhesive and cutbacks

Advantages

  • Class II vapor retarder ≥ 0.1 Perm and ≤ 1.0 Perm (2 coats)
  • Excellent adhesion promoter to a wide range of residues
  • Can be used as a vapor retarder in place of felt paper on wooden subfloors for glue assist applications
  • Colored formula to ensure uniform coverage
  • High coverage allows for cost saving
  • Low viscosity offers excellent penetration to highly porous substrates
  • Rapid-drying allows for same-day installation

Packaging

2.50 gal. (9.46 L) jerrycan

Color

Blue

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

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

Chemical Base

Polyurethane resin

Shelf Life

18 months from the date of production if stored properly

Storage Conditions

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions and protected from direct sunlight at temperatures between 41°F and 95°F (5°C and 35°C).

Condition material between 65°F and 86°F (18°C and 30°C) before using.

Density

~9.76 lbs/gal (~1.17 kg/L) at 68°F (20°C)
System information

System Structure

Substrate

Yes/No

Comment

Concrete

Yes

28 days old

Terrazzo

Yes

Must be mechanically prepared

Gypsum

Yes

1 coat only

Plywood

Yes1 coat only

OSB

Yes1 coat only

Wood subfloor panels

Yes1 coat only

 

Covering type

Yes/No

Needed materials*

Moisture mitigation

Hardwood

Yes

Polyurethane/hybrid polyurethane/MS

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

LVT, VCT**

Yes

Floating/high performance resilient adhesive

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Comm. carpet/carpet tile**

Yes

High performance resilient adhesive

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Sheet vinyl**

Yes

High performance resilient adhesive

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Ceramic tiles

Yes

SikaLevel®-02 EZ Primer, tile setting mortar

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Porcelain/natural stone

Yes

SikaLevel®-02 EZ Primer, tile setting mortar

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Cementitious SLU’s/patches

Yes

SikaLevel®-02 EZ Primer

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Gypsum SLU’s/patches

Yes

SikaLevel®-02 EZ Primer

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Acoustical rubber underlayment

Yes

Polyurethane/hybrid polyurethane/MS

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Rubber flooring

No

-

-

*Follow open times limitations in application section.

**Treat Sika® MB EZ Rapid 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.
Technical Information

Permeability to Water Vapor

≤ 0.4 Perm (≤ 0.4 g/m2-24h-mmHg) (2 coats)(ASTM E96)

Application

Application Information

Ambient Air Temperature

59°F to 95°F (15°C to 35°C)

Relative Air Humidity

≥ 40% RH

Dew Point

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.

Substrate Temperature

During laying and until Sika® MB EZ Rapid has fully cured, the substrate temperature must be between 59°F and 95°F (15°C and 35°C). 

Drying Time

1–2 hours (depending on environmental and subfloor conditions)
Consumption

Coverage

No. of coat 

Coverage per jerrycan

One-coat system

~1,000 sq.ft. (~92.90 m2)
Two-coat system~500 sq.ft. (~46.45 m2)

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.
Application steps

SUBSTRATE QUALITY

The substrate must be sound and of good compressive strength with a minimum pull-off strength of 150 psi (1.03 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 EZ Rapid 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.

SUBSTRATE PREPARATION

  • All substrate must have an open-textured surface to allow Sika® MB EZ Rapid 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.
  • Old water-soluble adhesive and cutbacks must be removed completely.
  • Old water-resistant adhesive and cutbacks must have all friable areas, loose materials and ridges mechanically removed. 
  • 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.
  • 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 EZ Rapid. 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 EZ Rapid. 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.

MIXING

Sika® MB EZ Rapid must be stirred or shaken well before use.

CLEANING OF TOOLS

Clean all tools and application equipment with cleaning solvent immediately after use. Hardened/cured material can only be removed mechanically.

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