Sikafloor®-81 EpoCem®

• Environmental Product Declaration (EPD) in accordance with EN 15804. EPD independently verified by Institut für Bauen und Umwelt e.V. (IBU)

• Contributes towards satisfying Materials and Resources (MR) Credit: Building product disclosure and optimization — Environmental Product Declarations under LEED® v4

• Contributes towards satisfying Materials and Resources (MR) Credit: Building Product Disclosure and Optimization — Material Ingredients under LEED® v4

• CE marking and declaration of performance based on EN 1504-2:2004 Products and systems for the protection and repair of concrete structures — Surface protection systems for concrete — Coating

• 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

• CE marking and declaration of performance based on EN 13813:2002 Screed material and floor screeds — Screed material — Properties and requirements — Synthetic resin screed material

• Migration test EN 23270, Sikafloor®-81 EpoCem, kiwa, Report No. P 8740a

• Water permeability test DIN 1048-5, Sikafloor®-81 EpoCem, Polymer Institut, Repo

Always refer to the best-before date of the individual packaging.

The Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to the packaging.

Refer to the current Safety Data Sheet for information on safe handling and storage.

Equivalent air layer depth for 3 mm thickness: S_d = 0.75 m

TEMPORARY MOISTURE BARRIER AND SELF SMOOTHING SCREED

At temperatures between +12 °C to +25 °C:

At temperatures between +8 °C to +12 °C and +25 °C to +30 °C:

The amount of part C can be reduced to 18 kg in order to improve workability. Never reduce the part C to less than the following:

CONCRETE PATCH REPAIR MORTAR

For use as a repair mortar Sikafloor®-81 EpoCem® can be bulked out with dry quartz sand.

For each 23 kg unit of Sikafloor®-81 EpoCem® add the following:

5 kg to 10 kg of Quartz sand (0.7-1.2 mm) plus 5 kg to 10 kg of Quartz sand (2.0-3.0 mm)

Final mix will be 33 kg to 43 kg in total.

Can be applied on green or damp concrete, without any standing water. Although the Product can be applied onto green concrete surfaces (> 24 hours), allow at least 3 days for early shrinkage of concrete to occur in order to prevent concrete shrinkage cracks from appearing on the screed surface.

Once Sikafloor®-81 EpoCem® is tack free it is possible to apply vapour permeable seal coats.

For the application of vapour tight coatings on Sikafloor®-81 EpoCem®, allow the surface moisture to fall below 4%, not earlier than:

2.25 kg/m² per mm of thickness

4.5 kg/m² for a 2 mm thick application (minimum for temporary moisture barrier)

Note: Consumption data is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply the Product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.

MIXING EQUIPMENT

• Electric double-paddle mixer (> 700 W, 300 rpm to 400 rpm)

• Forced action mixer

APPLICATION EQUIPMENT

• Smoothing trowel

• Spiked roller

IMPORTANT

Reduced service life due to incorrect treatment of cracks

The incorrect assessment and treatment of cracks may lead to a reduced service life and reflective cracking.

1. For static cracks, ensure the width is suitable for overcoating with Sikafloor®-81 EpoCem®.
2. For dynamic cracks, ensure the movement is within the movement capacity of Sikafloor®-81 EpoCem®.

TREATMENT OF JOINTS AND CRACKS

Construction joints and existing static surface cracks in substrate require pre-treating before full layer application. Use Sikadur® or Sikafloor® resins.

MECHANICAL SUBSTRATE PREPARATION

IMPORTANT

Surface defects due to voids in the substrate

Voids and blow holes in the substrate will weaken the surface and damage the covering Product if not repaired during the preparation process.

1. Fully expose blow holes and voids during surface preparation to identify the required repairs.

1. Remove weak cementitious substrates.
2. Prepare cementitious substrates mechanically using abrasive blast cleaning, abrasive planing or scarifying equipment to remove cement laitance.
3. Before applying thin layer resins, remove high spots by grinding.
4. Before applying the Product, remove all dust, loose and friable material from the application surface with an industrial vacuuming equipment.
5. Level the surface or fill cracks, blow holes and voids with products from the Sikafloor®, Sikadur® and Sikagard® range of materials.

For additional information on products for leveling and repairing defects, contact Sika® Technical Services.

SUBSTRATE PREPARATION OF NON-CEMENTITIOUS SUBSTRATES

For information on substrate preparation of non-cementitious substrates, contact Sika® Technical Services.

IMPORTANT

Addition of water

Do not add water to the mix or for finishing as this will affect the performance, surface finish and cause discolouration.

IMPORTANT

Unsuitable mixing equipment

Unsuitable mixing equipment will not combine the mix thoroughly or entrain too much air into the mix.

1. Do not use free fall mixers.

IMPORTANT

Avoid over-mixing to minimise air entrainment.

TEMPORARY MOISTURE BARRIER AND SELF SMOOTHING SCREED

1. Mix Part A (resin) for ~10 seconds with an electric double paddle mixer (300–400 rpm, > 700 W).
2. Add Part B (hardener) to Part A.
3. IMPORTANT Do not mix excessively. Mix for a further 2 minutes until a uniform mix is achieved.
4. Pour the mixed binder mixture (Parts A+B) into a suitable mixing container (capacity ~60 litres). Mix using the electric mixing equipment and gradually add Part C.
5. Mix continuously for 3 minutes, until a uniform mix is achieved.
6. To ensure thorough mixing, pour materials into another container and mix again to achieve a smooth and uniform mix.
7. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing.

CONCRETE PATCH REPAIR MORTAR

1. Mix Part A (resin) for ~10 seconds with an electric double paddle mixer (300–400 rpm, > 700 W).
2. Add Part B (hardener) to Part A.
3. IMPORTANT Do not mix excessively. Mix for a further 2 minutes until a uniform mix is achieved.
4. Pour the mixed binder mixture (Parts A+B) into a suitable mixing container (capacity ~60 litres). Mix using the electric mixing equipment and gradually add Part C.
5. Mix continuously for 3 minutes, until a uniform mix is achieved.
6. Gradually add the additional aggregates in the required quantities and mix for a further 3 minutes until a uniform lump free mix has been achieved.
7. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing.

IMPORTANT

Strictly follow installation procedures

Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

IMPORTANT

Protect from moisture

After application, protect the Product from damp, condensation and direct water contact for at least 24 hours.

IMPORTANT

Ventilation in confined spaces

Always ensure good ventilation when applying the Product in a confined space.

IMPORTANT

Pin holes caused by application during rising temperature

If the Product is applied on porous substrates during rising temperature, pin holes may form from rising air.

1. Apply the Product during falling temperatures.

IMPORTANT

Do not use curing compounds

Applications under extreme conditions (high temperature and low humidity) which can cause fast drying of the product must be avoided as the product does not allow the use of curing compounds.

IMPORTANT

Risk of cracking during curing

Allowing the Product surface to dry excessively and quickly during the curing period will result in surface cracking.

1. Protect the freshly applied Product from high ambient temperatures, direct sunlight and draughts.

Overcoating with PMMA

Note: When overlaying with PMMA screeds, the Product surface must be fully broadcast with clean and dry quartz sand.

Moisture barrier

Note: The TMB effect is limited in time without additional preparation. Always verify the surface moisture content if more than 8 days have passed since application.

TEMPORARY MOISTURE BARRIER OR SELF SMOOTHING SCREED

1. Pour the mixed Product onto the substrate. For the consumption, refer to Application Information.
2. Apply the Product evenly over the surface with a trowel.

3. Back-roll the surface in two directions at right angles with a spike roller.

   Note: Maintain a "wet edge" during application to achieve a seamless finish.

CONCRETE PATCH REPAIR MORTAR

1. As a bonding primer apply SikaTop® Armatec®-110 EpoCem® onto the prepared substrate by brush.
2. Place the mixed repair mortar onto the bonding primer 'wet on wet' using a gloved hand or trowel without the formation of voids.
3. Finish to the required surface texture using trowel or sponge as soon as the repair mortar has started to harden.

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