Vertical & Overhead - SikaRepair® SHB

One component, cementitious repair mortar with superior high build properties that may be hand applied or wet-sprayed

SikaRepair® SHB is a one-component, cementitious ready to use repair mortar. It is a multi-purpose mortar which can be applied by trowel or low pressure wet spray process. The incorporation of low density aggregates allows high build applications on vertical and overhead surfaces. SikaLatex® R or SikaLatex® may be used instead of water for a two component, polymer-modified repair mortar.

• Time/labor-saving material; application up to 3" (76 mm) on vertical surfaces in one layer
• Application by hand or low pressure wet spray method
• Easy to use; just add water
• High bond strength ensures excellent adhesion
• Good, early and ultimate strength
• Increased freeze/thaw durability and resistance to deicing salts
• Easy to clean
• Suitable for exterior and interior applications

Usage

• Fast repairs to overhead and vertical concrete on mortar surfaces on grade, above and below grade
• As a repair material for building facades, parking structures, industrial plants, bridges, etc.

Advantages

• Time/labor-saving material; application up to 3" (76 mm) on vertical surfaces in one layer
• Application by hand or low pressure wet spray method
• Easy to use; just add water
• High bond strength ensures excellent adhesion
• Good, early and ultimate strength
• Increased freeze/thaw durability and resistance to deicing salts
• Easy to clean
• Suitable for exterior and interior applications

Packaging

SikaRepair® SHB: 50 lb. (22.7 kg) bag
SikaLatex® (R): 1 gal. (3.8 L) plastic jug and 5 gal. (19 L) pail

Color

Gray powder

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 from moisture. If damp, discard material

Application

Application Information

Mixing Ratio

3/4 - 1 gal. (2.8 - 3.8 L) of liquid

Product Temperature

65-75 °F (18-24 °C)

Ambient Air Temperature

> 45 °F (7 °C)

Substrate Temperature

> 45 °F (7 °C)

Pot Life

~ 30 minutes

As the temperature 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

Consumption

Coverage

0.55 ft³ (0.02 m³) per bag

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

Application Steps

MIXING

• With water: Start with 3/4 gal. (2.8 L) of water added to the mixing vessel. Add 1 bag of SikaRepair® SHB while continuing to mix with a low-speed drill (400-600 rpm) and mixing paddle or in an appropriate mortar mixer. Add up to another 1/4 gal (1 L) of water to achieve desired consistency. Do not over-water.

• With SikaLatex® R: Pour 3/4 gal. (2.8 L) of SikaLatex® R into the mixing container. Slowly add powder, mix and adjust as above.

• With diluted SikaLatex® R: SikaLatex® R may be diluted up to 5:1 (water: SikaLatex® R) for projects requiring minimal polymer modification. Pour 3/4 gal. (2.8 L) of the mixture into the mixing container. Slowly add powder, mix and adjust as above.

APPLICATION

By hand

• The mixed SikaRepair® SHB must be worked well into the primed substrate, filling all pores and voids. Compact well. Force material against edge of repair working towards the center. Thoroughly compact the mortar around exposed reinforcement.
• After filling repair, consolidate, then screed.
• Finish with steel, wood, plastic floats, or damp sponges, depending on the desired surface texture.
• Where multiple lifts are required, score top surface on each lift to produce a roughened substrate for next lift. Allow preceding lift to harden before applying fresh material. SSD of the lift with clean water. If previous layers are over 48 hours old, mechanically prepare the substrate and dampen.

By machine

• Apply SikaRepair® SHB mortar by low or high pressure wet spray.
• Shoot perpendicular (90°) to the surface. This minimizes rebound, creates the smoothest pattern (reduces ‘bumps’) and properly encases the rebars.
• The velocity of the material is sufficient if, at a distance of 18 to 24" (457 to 609 mm), the material pattern flattens out on contact with the surface and the rebars are encased.
• After applying the material, allow it to stiffen for about 10 minutes before removing bumpy areas with a trowel.
• Before applying the next layer, allow the material to reach initial set. This will take anywhere from 45 minutes to several hours, depending on mix consistency, mix and ambient temperature, wind conditions and humidity.
• Begin and finish a given patch on the same day.

CURING TREATMENT

• As per ACI recommendations for Portland cement concrete, curing is required.
• Moist cure with wet burlap and polyethylene, a fine mist of water or a water based* compatible curing compound.
• Curing compounds adversely affect the adhesion of following lifts of mortar, leveling mortar or protective coatings.
• Moist curing should commence immediately after finishing. Protect freshly applied mortar from direct sunlight, wind, rain and frost.

* Pretesting of curing compound is recommended.

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