Sikafloor®-2640

• Conforms with LEED v4 MR credit: Building product disclosure and optimization — Material ingredients (option 2)

• Conforms with LEED v4 EQ credit: Low-emitting materials

• Conforms with LEED v4 MR credit: Building product disclosure and optimization — Environmental Product Declarations (option 1)

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

• VOC emissions A+, Sikafloor®-2640, eurofins, Attestation

• VOC Emissions AgBB, Sikafloor®-2640, eurofins, Report No. 392-2019-00253501_D_EN

• VOC emission classification GEV Emicode EC1^plus

• 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 13813:2002 Screed material and floor screeds — Screed material — Properties and requirements — Synthetic resin screed material

• Certificate of conformity for indirect food contact, Institut Wessling, Report No. CAL20-082715-1, July 2020

EN 1504-2: Surface protection product for concrete - Coating

EN 13813: Resin screed material for internal use in buildings

Epoxy

24 months from date of production

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 packaging.

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

100 %

Total solid composition acc. to the test method Deutsche Bauchemie e.V. (German Association for construction chemicals)

100 %

80 % r.h. max

Beware of condensation. The substrate and uncured applied product must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the surface of the applied product. Low temperatures and high humidity conditions increase the probability of blooming.

No rising moisture (ASTM D4263, polyethylene sheet)

Note: Do not leave mixed product in container after the end of the pot life. Fill container completely with quartz sand to stop the rapid exothermic reaction of the product which leads to foaming.

Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.

Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.

~0.6-0.8 kg/m² per coat

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

Incorrect treatment of cracks

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

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.

SUBSTRATE CONDITION

Cementitious substrates (concrete / screed) must be structurally sound and of sufficient compressive strength (minimum 25 N/mm²) with a minimum tensile strength of 1.5 N/mm².

Substrates must be clean, dry and free of all contaminants such as dirt, oil, grease, coatings, laitance, surface treatments and loose friable material.

MECHANICAL SUBSTRATE PREPARATION

IMPORTANT

Exposing blow holes and voids

When mechanically preparing the surface, make sure to fully expose blow holes and voids.

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

Contact Sika® Technical Services for additional information on products for levelling and repairing defects.

SUBSTRATE PREPARATION OF NON-CEMENTITIOUS SUBSTRATES

For information on substrate preparation of non-cementitious substrates, contact Sika technical services.

1. Mix Part A (resin) for ~30 seconds.
2. Add Part B (hardener) to Part A.
3. Mix continuously for 3 minutes, until a uniform mix is achieved.Note: Avoid excessive mixing to minimise air entrainment.
4. To ensure thorough mixing, pour materials into another container and mix again for at least 1 minute to achieve a smooth and uniform mix. Note: Avoid excessive mixing to minimise air entrainment.
5. 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

Protect from moisture

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

IMPORTANT

No application on rising moisture

Do not apply on substrates with rising moisture.

IMPORTANT

Temporary heating

If temporary heating is required, do not use gas, oil, paraffin or other fossil fuel heaters. These produce large quantities of both carbon dioxide and water vapour, which may adversely affect the finish.

1. For heating, use only electric powered warm air blower systems.

IMPORTANT

Indentations

Under certain conditions, underfloor heating or high ambient temperatures combined with high point loading may lead to indentations in the resin.

IMPORTANT

Temporary moisture barrier

If the substrate moisture content measured with the CM-method is > 4% by weight, apply a temporary moisture barrier consisting of Sikafloor® EpoCem®.

1. Contact Sika technical services for more information.

LEVELLING

After preparation, the substrate has a rough surface that will affect the finish of the coating.

1. Pour the mixed epoxy levelling mortar onto the prepared substrate and apply by trowel.
2. Confirm waiting / overcoating time has been achieved before applying subsequent products. Refer to the individual Product Data Sheet.

PRIMER

1. Pour the mixed primer onto the prepared substrate and apply by brush, roller or squeegee. IMPORTANT Do not blind the primer.
2. Back roller in two directions at right angles to each other. Note: Ensure a continuous, pore free coat covers the substrate. If necessary, apply two priming coats.
3. Confirm waiting / overcoating time has been achieved before applying subsequent products. Refer to the individual primer Product Data Sheet.

TEXTURED COATING

Wait the appropraite overcoating time before applying the textured coatingt. Refer to the indiviudal primer Product Data Sheet.

1. Apply the Product onto the prepared substrate using a short-piled roller in two directions at right angles to each other. Note: A seamless finish can be achieved if a ‘wet’ edge is maintained during application.

SEAL COAT

Wait the appropraite overcoating time before applying the textured coatingt. Refer to the indiviudal broadcast coating Product Data Sheet.

1. Pour the mixed Product onto the textured coating and spread evenly using a squeegee to completely encapsulate the sand.
2. Back roll the surface in two directions at right angles to each other with a short-piled roller. Note: A seamless finish can be achieved if a ‘wet’ edge is maintained during application.

Clean all tools and application equipment with Sika® Thinner C immediately after use. Hardened material can only be removed mechanically.