Product Data Sheet
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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, rapid-drying, polyurethane resin, moisture mitigation system, which is applied prior to the installation of floor covering products, self-leveling underlayments, floating floors, and other flooring systems.

  • Solvent-free
  • Rapid drying allows for same-day installation
  • Low viscosity offers excellent penetration to highly porous substrates
  • High coverage allows for cost saving
  • Single component formula
  • Colored formula to ensure uniform coverage
  • Solidifier of weak substrates
  • Can be used as a vapor retarder in place of felt paper on wooden subfloors for glue assist applications
  • Will prevent moisture related issues like cupping if substrate moisture levels are below Sika® MB EZ Rapid’s acceptable levels
  • Excellent adhesion promoter to a wide range of residues
  • Class II vapor retarder > 0.1 Perm and ≤ 1.0 Perm (2 coats)
Product Data Sheet
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Usage

  • Moisture barrier to control moisture vapor emission rates 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 92.9 m2) per 24 hours up to 98% RH/18 lbs. per 1,000 sq.ft. (8.16 kg per 92.9 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® Construction Adhesive, Sikaflex®-11FC, and SikaHyflex®-150 LM
  • Suitable on concrete, cement, self-levelling and gypsum substrates, OSB, plywood, water-resistant adhesive, and cutbacks
 

Advantages

  • Solvent-free
  • Rapid drying allows for same-day installation
  • Low viscosity offers excellent penetration to highly porous substrates
  • High coverage allows for cost saving
  • Single component formula
  • Colored formula to ensure uniform coverage
  • Solidifier of weak substrates
  • Can be used as a vapor retarder in place of felt paper on wooden subfloors for glue assist applications
  • Will prevent moisture related issues like cupping if substrate moisture levels are below Sika® MB EZ Rapid’s acceptable levels
  • Excellent adhesion promoter to a wide range of residues
  • Class II vapor retarder > 0.1 Perm and ≤ 1.0 Perm (2 coats)

Packaging

2.5 gal. (9.46 L) jug

Color

Blue

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

LEED V4.1 California Department of Public Health (CDPH) Standard Method v1.2: Private Office, School Classroom, and Residential
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 85°F (18°C and 30°C) before using.

Density

~9.76 lbs/gal (~1.17 kg/L)
System information

System Structure

Substrate

Yes/No

Comment

Concrete

Yes

28 days old

Terrazzo

Yes

Must be mechanically prepared

Gypsum

Yes

1 coat only

OSB

Yes1 coat only

Plywood

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

Sika® Level-02 EZ Primer, tile setting mortar

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Porcelain/natural stone

Yes

Sika® Level-02 EZ Primer, tile setting mortar

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Cementitious SLU's/patches

Yes

Sika® Level-02 EZ Primer

1 coat: ≤ 93% RH;

2 coats: ≤ 98% RH

Gypsum SLU's/patches

Yes

Sika® Level-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, Sika® Level-02 EZ Primer should be used and the surface smoothened with a suitable levelling compound prior to the use of resilient adhesives.
Technical Information

Permeability to Water Vapor

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

Application

Application Information

Ambient Air Temperature

59°F (15°C) min. / 95°F (35°C) max.

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 should be between 59°F and 95°F (15°C and 35°C). 

Cure Time

1-2 hours

Waiting / Recoat Times

1-48 hours for Sika® Level-02 EZ Primer and SikaBond® adhesives
Consumption

Coverage

Per gallon based on one coat system

~400 sq.ft.

Per unit based on one coat system

~1,000 sq.ft.
Per unit based on two coat system~500 sq.ft.

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

SUBSTRATE QUALITY

The concrete substrate must be sound with a minimum pull-off strength of 150 psi (1 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 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 2-3.
  • Old water-soluble adhesive cutback must be removed completely.
  • Old water-resistant cutback adhesive 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.
  • Repair with Sika® Level 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. 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 EZ Rapid 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.

MIXING

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

APPLICATION

  • Apply Sika® MB EZ Rapid uniformly (crosswise) to the substrate using a medium 1/4” nap roller, ensuring that a monolithic coat is achieved over the entire surface.
  • A minimum waiting time of 1 hour (or dry to the touch) should be performed between a two-coat application of Sika® MB EZ Rapid.
  • After a drying time of approx. 1 hour (or dry to the touch) from the last coat applied, prime with Sika® Level-02 EZ Primer prior to the installation of SikaLevel® underlayments or patching compounds. If Sika® Level-02 EZ Primer is not applied within the first 48 hours after drying, abrasion of the surface and solvent wiping without affecting the moisture mitigation properties should occur.
  • SikaBond® flooring adhesives can be installed directly to Sika® MB EZ Rapid after a drying time of at least 2 hours and within 48 hours. If SikaBond® adhesives are not applied within the first 48 hours after drying, abrasion of the surface and solvent wiping without affecting the moisture mitigation properties should occur.
  • When applied as a single coat, Sika® MB EZ Rapid can be used as a vapor retarder on wooden subfloors for glue assist applications. Adhesive must be applied within the Sika® MB EZ Rapid open time of 48 hours followed with the nailing of the wood flooring. 

CLEANING OF TOOLS

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

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