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Sika Primer MB, 2-Part Epoxy Primer and Moisture Barrier for Wood Flooring, Interior, Blue

Sika Primer MB, 2-Part Epoxy Primer and Moisture Barrier for Wood Flooring, Interior, Blue

Primers, Paints & Pigments
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging 5 kg
Chemical Base 2-Component, epoxy resin compound
Usage Used with SikaBond wood adhesives for moisture and adhesion control
Application Method Roller or brush
Usage Area Interior
Color Blue
Service Temperature +10 °C min. / +30 °C max.
Storage Conditions Sika Primer MB shall be stored in dry conditions, protected from direct sunlight and at temperatures between +5 °C and +25 °C.
Density Component A~1.10 kg/lComponent B~1.00 kg/lMixed~1.10 kg/l
Consumption 400–600 g/m2

Sika® Primer MB is a 2-component epoxy primer and moisture barrier for SikaBond wood flooring adhesives applied on difficult substrates.

  • 2-Component
  • Reactive epoxy
  • Solvent-free
  • Easy to apply, low viscosity
  • Allows quick completion
  • Good penetration and stabilization of the substrate
  • Suitable for refurbishing existing substrates
  • Suitable for use with underfloor heating
Usage
Sika® Primer MB is designed for use in conjunction with SikaBond wood flooring adhesives:
  • For moisture control on cement-based substrates with moisture contents of up to 6 % CM (carbide meter).
  • For substrate consolidation on concrete, cement and anhydrite screeds and refurbished substrates.
  • For adhesion promotion for broadcast mastic asphalt and on old adhesive residues.
 
Advantages
  • 2-Component
  • Reactive epoxy
  • Solvent-free
  • Easy to apply, low viscosity
  • Allows quick completion
  • Good penetration and stabilization of the substrate
  • Suitable for refurbishing existing substrates
  • Suitable for use with underfloor heating
Packaging

Component A+B5 kg metal pail

Component A+B

10 kg metal pail
Colour

Blue
Technical Information
Shore A Hardness

~80 (after 7 d)

(ISO 868)

Compressive Strength

~70 N/mm2 (after 7 d)

(EN 196 part 1)

Thermal Resistance

Sika® Primer MB can be permanently exposed to dry heat ≤ +50 °C and temporarily exposed to dry heat ≤ +80 °C.

Note: In order to avoid damage to the installed wood floor elements, surface temperature must not exceed +25 °C.

Service Temperature

−40 °C min. /  +70 °C max.
Application Information
Mixing Ratio

Component A : Component B = 100:37 (by volume)
Ambient Air Temperature

+10 °C min. / +30 °C max., min. 3 °C above dew point temperature
Relative Air Humidity

< 80 %
Substrate Temperature

During laying and until Sika® Primer MB has fully cured, the substrate and ambient temperatures shall be between +10 °C and +30 °C without and between +20 °C and +30 °C with underfloor heating.
Substrate Moisture Content

Permissible substrate moisture content without underfloor heating

For cement screeds<6 % CM (carbide meter)
For anhydrite screeds<0.5 % CM
For magnetite flooring3–12 % CM (depending on the organic content)

Permissible substrate moisture content for use with underfloor heating

For cement screeds<6 % CM
For anhydrite screeds<0.3 %
For magnetite flooring

3–12 % CM (depending on the organic content)

To check the moisture content, use the “Rubber Mat Test”, according to ASTM. A polyethylene sheet of > 1x1 m in dimension shall be taped to the concrete surface. Leave the polyethylene sheet in place for > 24 hours  prior to testing. This test allows for the detection of any condensed vapour transmissions.
Note: CM: carbid method, to determine the moisture content of the substrate. For all moisture contents, the quality of the substrates and surfaces, always follow the guidelines of the wood flooring manufacturer.
Pot Life
Ambient air temperaturePot life
+10 °C~60 min
+20 °C~30 min
+30 °C~15 min

Note: Do not use mixed material after pot life.
Curing Time

ConditionsCuring time
+10 °C~18 h
+20 °C~12 h
+30 °C~6 h

Note: Curing speed is dependent on temperature, relative humidity and absorption of substrates. High temperature and low r.h. decrease curing time. Cured material becomes transparent.