Sika MonoTop®-4012 BE

• IBU Environmental Product Declaration (EPD).

• CE marking and declaration of performance based on EN 1504-3:2005 Products and systems for the protection and repair of concrete structures — Structural and non-structural repair.

Sulphate resistant and replacement cement, selected aggregates and additives 

12 months from date of production

The product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +35 °C. Always refer to packaging.

D_max: 2 mm

Class R4

3.50 to 3.75 L of water per 25 kg bag

+5 °C minimum / +30 °C maximum 

+5 °C minimum / +30 °C maximum

~ 60 minutes (at +20 °C)

NOTE: Colder temperatures will extend the pot life, whereas higher temperatures will reduce the pot life. 

~2.2 kg/L

~ 1,90 kg/m²/mm

Consumption depends on the roughness and absorbency of the substrate. This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc.

25 kg of powder yields ~13,2 L of mortar

• Avoid application in direct sun and / or strong winds.
• Do not add water over recommended dosage.
• Apply only to stable, prepared substrates.
• Do not add additional water during the surface finishing as this can cause discolouration and cracking.
• Protect freshly applied material from freezing.
• Do not feather edge. 

Select the most appropriate equipment required for the project:

Substrate preparation

• Mechanical hand held tools.
• High / ultra-high pressure water blasting equipment.

Steel reinforcement

• Abrasive blast cleaning equipment.
• High pressure water blasting equipment.

Mixing

• Small quantities - low speed electric single or double paddle mixer (<500 rpm). Mixing Container.
• Large quantities or machine application - suitable forced action mixer.

Application

• Hand applied – Plasterer's hawk, trowel.
• Wet Spray - Suitable all-in-one mixing and spraying machine, or separate spraying machine and all associated ancillary equipment to suit application volumes. Always complete a small-scale trial before project use to ensure efficacy. 

Finishing

• Trowel (PVC or wooden), sponge. 

Also refer to Site Handbook ‘Repair of Concrete Structures – Patch Repair and Spray Applications’.

Hand applied and wet spray application

Pour the minimum recommended clean, potable water quantity into a suitable mixing container or equipment. While stirring slowly, add the powder to the water and mix thoroughly for at least for 3 minutes, adding additional water if necessary to the maximum specified amount and adjust to the required consistency to achieve a smooth consistent mix. The consistency must be checked after every mix.

Strictly follow installation procedures as defined in Method Statements, Application Manuals and Working Instructions which must always be adjusted to the actual site conditions.

Reinforcement corrosion protection coating

Where a reinforcement coating is required, apply to the whole exposed circumference Sika MonoTop®- 1010 or SikaTop® Armatec® 110 EpoCem® (refer to Product Data Sheet(s)).

Bonding primer

On well prepared and roughened substrates, or for a sprayed application, a bonding primer is generally not required. When a bonding primer is required to achieve the required adhesion values, use Sika MonoTop®-1010 or SikaTop® Armatec® 110 EpoCem® (refer to respective Product Data Sheets). Apply repair mortar onto bonding primer 'wet-on-wet'.

Repair Mortar

Hand application

Thoroughly pre-wet the prepared substrate (at least two hours is recommended) before application. Keep the surface wet and do not allow to dry. Before application, remove excess water (e.g. with a clean sponge). The surface must appear dark matt in appearance without shining, and surface pores and cavities must not contain water.

When manually applying by hand, first make a scratch coat by firmly scraping the repair mortar over the substrate surface to form a thin layer and fill any pores or cavities in the surface. Ensure the whole surface to be repaired is covered by the scratch coat. The repair mortar must be applied onto the wet scratch coat between the minimum and maximum layer thicknesses without the formation of voids. Where layers are to be built up, to prevent sagging or slumping, each layer should be allowed to harden before applying subsequent layers 'wet-on-wet'.

Sprayed application - Wet spray

The wet mixed Sika MonoTop®-4012 BE must be placed into the spraying equipment and applied onto the pre-wetted substrate (pre-wet procedure as per hand application) between the minimum and maximum layer thicknesses without the formation of voids. Where layers are to be built up, to prevent sagging or slumping, each layer must be allowed to harden before applying subsequent layers 'wet-on-wet'.

Surface finishing

Finishing for all types of application must be carried out to the required surface texture using suitable finishing tools as soon as the mortar has started to harden.

Cold weather working

Consider storing bags in a warm environment and using warm water to assist with achieving strength gain and maintaining physical properties.

Hot weather working

Consider storing bags in a cool environment and using cold water to assist with controlling the exothermic reaction to reduce cracking and maintaining physical properties. 

Protect fresh mortar immediately from premature drying using an appropriate curing method (e.g. curing compound, moist geotextile membrane, polythene sheet, etc.). 

Curing compounds must not be used when they could adversely affect subsequently applied products and systems.

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