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

One-Component, Rapid-Drying, Polyurethane Resin, Moisture Mitigation System and Substrate Solidifier. Sika® MB EZ Rapid can be used as a fast-curing moisture mitigation system for interior use only on cement-based substrates up to 98% RH or 18 lbs./1000 sq. ft./24 hrs. before applying SikaLevel® underlayments and SikaBond® adhesives. Sika® MB EZ Rapid can be used as a solidifier over a variety of critical substrates, such as adhesive residues and gypsum substrates.

  • Rapid drying allows for same-day installation
  • Solvent-free low VOC formula
  • 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 (1 coat)
  • Permeance (ASTM E96): ≤ 0.4 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./1000 sq. ft./24 hrs. up to 98% RH/18 lbs./1000 sq. ft./24 hrs. 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

  • Rapid drying allows for same-day installation
  • Solvent-free low VOC formula
  • 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 (1 coat)
  • Permeance (ASTM E96): ≤ 0.4 perm (2 coats)

Packaging

2.5 gal. (9.46 L) plastic jug

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

APPROVALS / STANDARDS

  • ASTM Standard (ASTM F3513-24) for Mitigating Moisture Beneath Resilient Approved
 
Product Information

Chemical Base

Single component polyurethane resin

Shelf Life

18 months from date of production if stored properly in original, unopened and undamaged sealed packaging

Storage Conditions

Store dry at 41–95 °F (5–35 °C).

Condition material to 65–85 °F (18–30 °C) before using.
System information

System Structure

Substrate

Yes/No

Comment

Concrete

Yes

28 days old

Terrazzo

Yes

Must be mechanically prepared

Gypsum

Yes

1 coat only

OSBYes1 coat only
PlywoodYes1 coat only
Wood Subfloor PanelsYes1 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 should be used and the surface smoothened with a suitable levelling compound prior to the use of resilient adhesives. 

Application

Application Information

Cure Time

1 - 2 hours

Waiting / Recoat Times

1 - 48 hours for SikaLevel-02 EZ Primer and SikaBond Adhesives

 
Consumption

Coverage

400 sqft. per gallon based on one coat system.

1000 sqft. per unit based on one coat system.

500 sqft. per unit based on two coat system.
Application steps

SUBSTRATE PREPARATION

  • All concrete surfaces must have an open textured surface to allow Sika® MB EZ Rapid to penetrate the surface and function properly as a moisture barrier or substrate consolidator.
  • All substrates must be porous per ASTM F3191, dry, stable, sound, and free of all contaminants such as grease, oil, paint, wax, dust, curing, and sealing compounds that will interfere with the adhesion of Sika® MB EZ Rapid.
  • All loose friable material, including preparation residue, must be completely removed using a vacuum.
  • Water-soluble adhesive cutback should be removed completely.
  • Water-resistant cutback adhesive loose material and ridges should be removed. Old asphaltic cutbacks can contain asbestos which is dangerous for the health so do not grind, sand, or blast.
  • Moisture vapor emission rates of the substrate should comply with and meet the requirements of Sika® MB EZ Rapid.
  • 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.
  • 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 with Sika Loadflex-524 EZ in strict accordance with the installation instructions provided by the Sika Technical Service Department and covered with Sika MB EZ Rapid within 24 hours. Dormant hairline cracks can be covered with an appropriate Sika flexible sealing compound.
 

APPLICATION

  • Stir or shake before use.
  • Apply Sika® MB EZ Rapid uniformly (crosswise) to the substrate using a medium ¼” 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 SikaLevel®-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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