Sika MonoTop®-623 F
Sika MonoTop®-623 F is a one-component, polymer-modified, fibre-reinforced and early strength-gaining, cementitious mortar for overhead and vertical concrete repair and reprofiling. It is based upon Sika’s internationally proven and established MonoTop® technology, designed for effective repairs and with the environment in mind. MonoTop®-623F
- Pre-bagged for quality control and predictable performance.
- Easy to prepare; just add potable water.
- Does not require additional polymer, mix with potable water only.
- Contains integral corrosion inhibitor based on proven technology.
- Formulated with inert, non-reactive aggregates to eliminate potential Alkali-Aggregate Reactivity (AAR).
- Heat of hydration minimized to extend working time, especially in warm conditions.
- Can be hand-placed or wet-sprayed.
- Excellent bond, tensile and flexural strengths.
- High build, yet can be feather-edged.
- High early strength.
- Shrinkage-controlled to reduce length change.
- Very easy to apply; can be shaved or sculpted and easily finished.
- Product produces light grey repairs, similar to precast concrete.
Usage
- On, above, and below grade.
- Overhead and vertical concrete and mortar.
- Cast-in-place, precast and tilt-up structures.
- Exterior and interior applications.
Advantages
- Pre-bagged for quality control and predictable performance.
- Easy to prepare; just add potable water.
- Does not require additional polymer, mix with potable water only.
- Contains integral corrosion inhibitor based on proven technology.
- Formulated with inert, non-reactive aggregates to eliminate potential Alkali-Aggregate Reactivity (AAR).
- Heat of hydration minimized to extend working time, especially in warm conditions.
- Can be hand-placed or wet-sprayed.
- Excellent bond, tensile and flexural strengths.
- High build, yet can be feather-edged.
- High early strength.
- Shrinkage-controlled to reduce length change.
- Very easy to apply; can be shaved or sculpted and easily finished.
- Product produces light grey repairs, similar to precast concrete.
Colour
Light Grey
FAQ
While this product is acceptable for horizontal applications, we recommend the usage of Sika MonoTop®-622F for a better workability.
Curing must commence immediately after placing and finishing. Moist-curing must be maintained for the first 24 hours only. Protect freshly applied mortar from direct sunlight, wind, rain, and frost.
Apply a 3 mm (1/8 in) thick scrub coat of the mixed mortar into the substrate, filling all pores, voids and edges and completely covering the repair site. Onto the fresh scrub coat, force the mortar against the edge of repair, working toward the centre and observing minimum and maximum layer thicknesses. If the repair requires several lifts (layers), apply the mortar, leaving a rough profile, and then score the surface immediately in a crosshatch pattern to a depth of approximately 6 mm (¼ in) to provide a key. Allow the layer to achieve initial set and then apply subsequent layers as soon as the previous lift will support it without being displaced. Allow the completed repair to set to desired stiffness; shave, cut or sculpt and then finish with a steel, wood or sponge float, or texture as required. If using a soft- to medium density and dampened sponge to finish a repair, work in circular motion to remove trowel marks and merge the mortar with the parent substrate.
Note: Avoid over dampening the sponge or the face of the repair during finishing and avoid over-finishing the material.
During application, Substrate should be saturated surface dry (SSD) with no standing water, and repair sites or surfaces should be damp (saturated surface dry) but free from standing water or glistening water films.
Mix to a uniform consistency for a minimum of three (3) minutes. Add additional water to the product up to maximum of 3.3 L (0,87 US gal) and, if a more fluid consistency is desired, continue to mix beyond the initial three (3) minute mixing period.
3.1 to 3.3 L (0.82 to 0,87 US gal.) of water per 22.7 kg (50 lb) bag.
For each 22.7 kg (50 lb) bag of material, pour approx. 3.1 L (0.82 US gal.) of potable water into a suitably sized and clean mixing container. Use only potable water and do not overwater.
Remove all deteriorated concrete, dirt, oil, grease, other bond inhibiting materials from the surface. Preparation work should be done by chipping, high-pressure water blasting or other appropriate mechanical means. Obtain substrate aggregate fracture with a minimum surface profile of ± 3 mm (1/8 in) (ICRI / CSP 6 - 9). Dampen surface to be repaired with clean water. Substrate should be saturated surface dry (SSD) with no standing water during the application.
Approximately 12.9 L (0.45 ft3) per 22.7 kg (50 lb) bag.
The minimum ambient and substrate temperature is +5 °C (41 °F) and rising at time of application. For best results, condition product to +18 to +29 °C (65 to 84 °F) prior to mixing and installation. Lower temperatures may result in slower strength development and longer cure times.
The application time takes about 20 to 40 minutes while the finishing time takes 40 to 60 minutes.
