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Sika MonoTop®-412 HS

High Strength Structural Repair Mortar

Sika MonoTop®-412 HS is a single component cementitious, silica fume containing, synthetic fibre reinforced, structural repair mortar that contains Portland Cement, well graded sands, specially selected fibres and additives to improve the fresh and hardened properties.
Suitable for use in hot and tropical climatic conditions.

Sika MonoTop®-412 HS provides the following beneficial properties:
  • Structural repair
  • Rapid strength gain and high final strength
  • Good water and oil resistance
  • Low shrinkage behaviour
  • High abrasion resistance
  • Good adhesion
  • Easy to apply
  • Application up to 60 mm in 1 layer
  • Low permeability
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Usage

Sika MonoTop®-412 HS is used for structural repair work and suitable for:
  • Restoration works, repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works.
  • Structural strengthening by increasing the bearing capacity of the concrete structure by adding mortar (section enlargement).
  • Preserving or restoring passivity by increasing cover with additional mortar and replacing contaminated or carbonated concrete.
 

Advantages

Sika MonoTop®-412 HS provides the following beneficial properties:
  • Structural repair
  • Rapid strength gain and high final strength
  • Good water and oil resistance
  • Low shrinkage behaviour
  • High abrasion resistance
  • Good adhesion
  • Easy to apply
  • Application up to 60 mm in 1 layer
  • Low permeability

Packaging

25 kg paper bags

Colour

Grey powder

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Sika MonoTop®-412 HS follows the main requirements of EN 1504-3:2006 class R4
Product Information

Composition

Polymer containing cementitious mortar with different additives and synthetic fibres

Shelf life

12 months minimum from date of production

Storage conditions

Store in a cool, dry area in original sealed packaging and at temperatures between +5 °C and +35 °C. Protect from direct sunlight, heat and moisture.

Maximum Grain Size

~2 mm
Technical Information

Compressive Strength

w/p = 0.12

1 day

7 day

28 day

≥ 35 N/mm2

≥ 65 N/mm2

≥ 80 N/mm2

Modulus of Elasticity in Compression

≥ 20 GPa

(EN 13412)

Tensile Adhesion Strength

≥ 2.0 N/mm2 (concrete failure)

(EN 1542)

Thermal Compatibility

≥ 2.0 N/mm2

(EN 13687-2)

Capillary Absorption

≤ 0.5 kg/(m2 x h0.5)

(EN 13057)

Carbonation Resistance

Dk ≤ reference concrete MC(0.45)

(EN 13295)

Application

Application Information

Mixing Ratio

~2.75 - 3.25 L of water per 25 kg bag

Fresh Mortar Density

~2.20 kg/l

Layer Thickness

Min. 5 mm
Max. 60 mm

Ambient Air Temperature

+5 °C min. / +40 °C max.

Substrate Temperature

+5 °C min. / +40 °C max.
Application steps

MIXING

Add water according to the desired consistency into a clean mixing vessel before slowly adding the Sika MonoTop®-412 HS powder. Sika MonoTop®-412 HS is best mixed in a forced action mixer, for 2 to 3 minutes or until the mix is free of lumps, not longer than 5 minutes. Slow speed double paddle drill (maximum 500 rpm) can be also used for mixing. Normal tumble type concrete mixers are not suitable. Do not add extra water or other ingredients. Mix only full bags for the best result.

 

APPLICATION

Apply Sika MonoTop®-412 HS while the bonding agent is still wet. The mortar can be applied by spatula or trowel.
As soon as the mortar has started to set it can be smoothed by wooden or synthetic float, styrofoam block or sponge. For fine surface finish SikaRep® Fine-N, Sika®Rep Fine-PC® can be applied over the Sika MonoTop®-412 HS.

CURING TREATMENT

Good curing practice must always be followed. Curing of the installed repair should be done using either Antisol®-WB curing agent or by damp hessian and polythene.

CLEANING OF EQUIPMENT

Clean all tools and equipment with water immediately after use. Hardened Sika MonoTop®-412 HS can only be removed mechanically.

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