Product Data Sheet
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SikaTop®-121 Plus

Two-component, polymer-modified, cementitious leveling/pore sealing mortar plus FerroGard 901 penetrating corrosion inhibitor

SikaTop®-121 Plus is a two component, polymer-modified, leveling and pore sealing mortar with the additional benefit of FerroGard® 901, penetrating corrosion inhibitor. SikaTop®-121 Plus provides a smooth substrate, free of irregularities and bug holes for following protective coatings.

  • Excellent adhesion to concrete and mortar substrates
  • High flexural and compressive strengths
  • Increased density - improved carbon dioxide resistance (carbonation) without adversely affecting water vapor transmission (not a vapor barrier)
  • Increased freeze/thaw durability and resistance to deicing salts
  • Enhanced with FerroGard® 901, a penetrating corrosion inhibitor - reduces corrosion even in the adjacent concrete
  • Compatible with coefficient of thermal expansion of concrete - Passes ASTM C-884 modified
  • Can be applied over Sika® FerroGard® 903, corrosion inhibiting impregnation
  • Not flammable
Product Data Sheet
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Usage

  • As a leveling/pore sealing mortar prior to protective coatings.
  • On horizontal, vertical and overhead surfaces, interior and exterior.
  • On grade, above and below grade, on concrete and mortar substrates.
  • Block filler.
  • Minor repair for gouges and broken edges.
 

Advantages

  • Excellent adhesion to concrete and mortar substrates
  • High flexural and compressive strengths
  • Increased density - improved carbon dioxide resistance (carbonation) without adversely affecting water vapor transmission (not a vapor barrier)
  • Increased freeze/thaw durability and resistance to deicing salts
  • Enhanced with FerroGard® 901, a penetrating corrosion inhibitor - reduces corrosion even in the adjacent concrete
  • Compatible with coefficient of thermal expansion of concrete - Passes ASTM C-884 modified
  • Can be applied over Sika® FerroGard® 903, corrosion inhibiting impregnation
  • Not flammable

Packaging

Component AComponent B

1 gal (3.78 L) jug

4/carton

46.5 lb (21.1 kg) bag

Color

Concrete gray when mixed

Product Details

Product Information

Shelf Life

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

Storage Conditions

Store dry at 40–95 °F (4–35 °C)

Protect Component A from freezing. If frozen, discard.

Protect Component B from moisture. If damp, discard.
Technical Information

Compressive Strength

1 day1,250 psi (8.6 MPa)
7 days5,000 psi (34.5 MPa)
28 days6,000 psi (41.4 MPa)

Flexural Strength

28 days2,000 psi (13.8 MPa)

Splitting Tensile Strength

28 days750 psi (5.2 MPa)

Tensile Strength

28 days2,000 psi (13.8 MPa)

* Mortar scrubbed into substrate at 73 °F (23 °C) and 50 % R.H.

Pull-Out Resistance

28 days

350 psi (2.4 MPa)

substrate failure

Rapid Chloride Permeability

28 days

~ 500 C

Corrosion Test

Cracked Beam Corrosion Tests for Sika FerroGard®-901

400 days

Reduced corrosion rates 63 % versus control specimens

Application

Application Information

Mixing Ratio

Plant-proportioned kit. Mix entire unit.

Layer Thickness

Min.Max.
1/12" (2 mm)1/6" (4 mm)

Product Temperature

65–75 °F (18–24 °C)

Ambient Air Temperature

> 45 °F (7 °C)

Substrate Temperature

> 45 °F (7 °C)

Application Time

~  45 minutes

As the temperature and relative humidity will affect the pot life, application temperature:

Above 73 °F (23 °C) will reduce the pot life and workability

Below 73 °F (23 °C) will extend the pot life and workability

Finishing Time

45 to 60 minutes after combining components*

* Depends on temperature, relative humidity, and type of finish desired.

 
Consumption

Coverage

0.4 ft3 (0.01 m3) or 65 ft2 at 1/12" (6 m2 at 2 mm) per bag

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

MIXING

  • Pour approximately 4/5 of Component A into mixing container.
  • Add Component B while continuing to mix.
  • Mechanically mix with a low-speed drill (400–600 rpm) and paddle or appropriate-size mortar mixer.
  • Mix to uniform consistency, maximum 3 minutes.
  • Add remaining Component A to mix if a more loose consistency is desired.
  • Manual mixing can be tolerated only for less than a full unit.
  • Refer to ACI 306 & 305 Guidelines when there is a need to place this product in cold & hot temperatures.

APPLICATION

  • SikaTop®-121 Plus can be applied by trowel, notched trowel, stiff bristle, or low pressure hopper gun.
  • Work the material well into the prepared substrate, filling all pores and voids.
  • As soon as the mortar layer starts to set, a uniform surface texture can be obtained by rubbing the surface with a fine sponge or a plastic trowel.
  • Do not overwork SikaTop®-121 Plus during finishing and avoid the use of additional water.
 

CURING TREATMENT

  • As per ACI recommendations for Portland cement concrete, curing is required.
  • Protect freshly applied mortar from direct sunlight, wind, rain and frost.
  • To prevent from freezing, cover with insulating material.
  • Curing compounds adversely affect the adhesion of protective coatings. Therefore, do not use a water based curing compound, if the leveling mortar is going to be over coated.

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