Sika MonoTop®-620

Portland cement, polymer redispersable powder, selected aggregates and
additives.

6 months from date of production

store properly in original unopened, sealed and undamaged packaging in dry and cool conditions.

Mixed wet 2.0 kg/litre

• Sika® MonoTop-620 is part of the Sika® MonoTop Concrete Repair System
• Sika® MonoTop-610: Bonding primer and reinforcement coating
• Sika® MonoTop-612: Hand and wet spray applied repair mortar
• Sika® MonoTop-615: Hand and wet spray high build applied repair mortar
• Sika® MonoTop-620: Smoothing coat
• Sika® FerroGard®-903: Corrosion inhibitor

28 days @ 20^oC ~ 30-35 N/mm2

~ 15.4 kN/mm2

28 days @ 20^oC ~ 4-6 N/mm2

~ 1.5-2.5 N/mm2 (substrate failure)

• Wet Spray Application : 2.5 to 3.5 L of water for 25kg powder
• Hand Application: ~ 4.0 to 4.5 L of water for 25 kg powder

1.5 mm min. / 5.0 mm max.

+5°C min. / +30°C max.

+5°C min. / +30°C max.

This depends on the substrate roughness and thickness of layer applied. As a guide, ~ 2.0 kg/m2/mm.

Sika® MonoTop-620 can be mixed with a slow speed (< 500 rpm) electric drill mixer.

Pour the water in the correct proportion into a suitable mixing container. While stirring slowly, add the powder to the water. Mix thoroughly for at least 3 minutes to the required consistency.

Smoothing Coat/Levelling Mortar
The surface should be pre-wetted to a saturated surface dry condition before application. Pre-fill surface defects before applying as a smoothing coat. Apply Sika® MonoTop-620 by spatula or trowel to the required thickness and finish. Where Sika® MonoTop-620 is to be overcoated, finishing with a moist neoprene sponge or brush after initial set has taken place is recommended to provide a key
for the coating. Do not overwork Sika® MonoTop-620 during or after applying. Should Sika® MonoTop-620 mortar be wetted during the initial cure period a white ‘bloom’ may be produced on the surface. This however, does not affect the long term properties of the mortar.

Pore filler:
Tightly trowel over surface and force into pores and other surface defects. Before overcoating remove excess material from surface while wet and wash down if necessary when dry to remove any dust deposits which may affect the bond of subsequent coatings.

It is essential to cure the repair mortar immediately after application for a minimum of 3 days to ensure full cement hydration and to minimise cracking. Use polythene sheeting taped down at the edges or other approved method. Curing compounds shall not be used if smoothing coat is to be overcoated.

Clean all tools and application equipment with water immediately after use. Hardened/cured material can only be mechanically removed.