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Sika MB Redline 2 Gal. Solvent-Free Fast Epoxy Moisture Barrier

Original price was: $399.99.Current price is: $249.95.

Stock#: 533163 | UPC#: _________

Sold by the Bucket | Online Sale Only

  • Cures in 3 hours for fast turnaround jobs
  • Can be used with carpet, resilient flooring, wood flooring, floating floors, and all types of floors that require subfloor moisture protection
  • Solvent-free (100% solids)


SKU: 533163 Category: Tag:

SikaTile MB Redline

For a fast and effective solution to protect your floors from subfloor moisture, look no further than Sika® MB Redline. This 2-component, rapid-curing, solvent-free epoxy moisture control system offers low viscosity and exceptional performance, making it perfect for use with all types of flooring systems. Whether you're installing wood flooring, self-leveling underlayments, or floating floors, Sika® MB Redline is the ideal choice for anyone looking for a reliable moisture barrier that delivers outstanding results. Don't let subfloor moisture damage your floors - choose Sika® MB Redline for unbeatable protection today.



  • 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/1000 ft2/24 h (11.4 kg/92.9 m2/24 h)
  • For substrate consolidation on concrete, cement, and gypsum screeds
  • Adhesion promoter for old and new adhesive residues in conjunction with other Sika® products


  • Cures in 3 hours for fast turnaround jobs
  • Can be used with carpet, resilient flooring, wood flooring, floating floors, and all types of floors that require subfloor moisture protection
  • 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 and Sika® Levels.


Sustainability | Certifications | Approvals



  • 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.


66 lb/ft(1.05 kg/l)

Technical Information

Permeability to Water Vapor

0.06 g/m2 - 24hour-mmHG (ASTM E-96)


Ambient Air Temperature

50°-86 °F (10°-30 °C)

Substrate Temperature

50°-86 °F (10°-30 °C)

Must be a minimum of 5 °F (3 °C) above the measured dew point temperature.

Pot Life

60 °F (10 °C) ~ 16 minutes
73 °F (20 °C) ~ 12 minutes

Working time temperature: 50°-80 °F (10°-26.7 °C)

Cure Time

60 °F (10 °C) 3.5 hours
73 °F (23 °C) 3 hours

The minimum curing time, prior to walking on primer/or for applying SikaBond® or Sika® Level.

Application Time

Overcoating Application Time Window* Minimum Maximum
SikaBond® Wood

Flooring Adhesive

3 hours 16 hours
Sika® Level-02 EZ Primer + Sika® Level

cementitious product

3 hours 48 hours
Sika® MB Redline

(2nd coat)

3 hours 24 hours

* When Sika® MB Redline is left on the substrate for more than the maximum allowable open time, the surface must be mechanically prepared (i.e. sanded) and solvent wiped before proceeding.




Coverage per pail
Moisture barrier 200–250 ft2 (18.5– 23.2 m2)
Adhesion promoter or

Surface consolidator

300–350 ft2 (27.9–32.5 m2)

(Coverage figures do not include allowance for surface profile and porosity or material waste).


Application Recommended


Results in
Moisture barrier only min. 1 Mirror-like finish

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


  • 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 Redline 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 Redline 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 Redline.
  • On fiber-reinforced concrete, fibers should be flamed off the surface prior to the application of Sika® MB Redline 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.



  • 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 product.
  • 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.


  • Clean all tools and application equipment with cleaning solvent (Xylene and MEK are effective).
  • Hardened/cured material can only be removed mechanically.


Sold As: Bucket (2.00 Gallons)
Weight Per Bag: 45 Pounds
Shipped Via: UPS Ground / LTL Delivery


Additional information

Weight 50 lbs
Dimensions 24 × 12 × 12 in


Installation Method

Applied with Paint Roller, Pour Directly on the Sub-Floor

Product Type

Moisture Barrier, Moisture Guard


Substrate Prep


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