Sikafloor®-2640
High-build, fast-curing epoxy floor coating and seal coat
Sikafloor®-2640 is a fast-curing, coloured, epoxy floor coating and seal coat. It provides a hard-wearing, low-maintenance, slip-resistant gloss finish when broadcasted with different aggregate grades.
- Very good blush resistance
- Fast curing
- Good yellowing resistance
- Good resistance to specific chemicals
- Good mechanical resistance
- Low maintenance
- Low odour
- Low VOC content
- Low VOC emissions
- Seamless
Usage
The Product is used as a:- Coloured, slightly textured roller coat for concrete and cement screeds with normal to medium wear
- Seal coat or top coat for slip-resistant broadcast systems
- The Product may only be used for interior applications.
- The Product may only be used by experienced professionals.
Advantages
- Very good blush resistance
- Fast curing
- Good yellowing resistance
- Good resistance to specific chemicals
- Good mechanical resistance
- Low maintenance
- Low odour
- Low VOC content
- Low VOC emissions
- Seamless
Packaging
Container Part A | 26.7 kg containers |
Container Part B | 3.3 kg containers |
Container Part A + Part B | 30 kg ready to mix units |
Refer to the current price list for available packaging variations.
Colour
Part A | coloured liquid |
Part B | transparent liquid |
Cured appearance | Gloss finish |
Almost unlimited choice of colours.
Exposure to direct sunlight
Note: When the product is exposed to direct sunlight, there may be some discolouration and colour variation. This has no influence on the function and performance of the coating.
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Product Details
ENVIRONMENTAL INFORMATION
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Contributes towards satisfying Materials and Resources (MR) Credit: Building Product Disclosure and Optimization — Material Ingredients under LEED® v4
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Contributes towards satisfying Indoor Environmental Quality (EQ) Credit: Low-Emitting Materials under LEED® v4
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Contributes towards satisfying Materials and Resources (MR) Credit: Building product disclosure and optimization — Environmental Product Declarations under LEED® v4
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VOC emissions A+, Sikafloor®-2640, eurofins, Attestation
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VOC emission classification GEV Emicode EC1plus
APPROVALS / STANDARDS
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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
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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
Chemical Base
Solvent-free epoxy
Shelf Life
24 months from date of production
Storage Conditions
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.
Density
Part A | 1.58 kg/l |
Part B | 0.98 kg/l |
Mixed Product | 1.48 kg/l |
Solid content by mass
~ 100 %
Solid content by volume
~ 100 %
Shore D Hardness
Cured 7 days at +23 °C | ~ 78 |
Abrasion Resistance
Cured 7 days at +23 °C | ~ 935 mg (H22 / 1000 g / 1000 cycles) |
Tensile adhesion strength
> 1.5 N/mm² (failure in concrete) | (EN 1542) |
Service Temperature
IMPORTANT
Simultaneous mechanical and chemical strain
While the Product is exposed to temperatures up to +60 °C, simultaneous mechanical or chemical strain may cause damage to the Product.
- Do not expose the Product to chemical or mechanical strain at elevated temperatures
Maximum | +60 °C |
Application
Mixing Ratio
Part A : Part B (by weight) | 89 : 11 |
Product Temperature
Maximum | +30 °C |
Minimum | +5 °C |
Ambient Air Temperature
Maximum | +30 °C |
Minimum | +5 °C |
Relative Air Humidity
Maximum | 80 % r.h. |
Dew Point
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.
Substrate Temperature
Maximum | +30 °C |
Minimum | +5 °C |
Substrate Moisture Content
Substrate | Test method | Moisture content |
Cementitious substrates | Calcium carbide method (CM-method) | ≤ 4 % |
No rising moisture (ASTM D4263, polyethylene sheet)
Temporary moisture barrier
Note: If the substrate moisture content measured with the CM-method is > 4% by weight, apply a temporary moisture barrier consisting of Sikafloor® EpoCem®.
- Contact Sika technical services for more information.
Pot Life
+10 °C | ~ 30 minutes |
+20 °C | ~ 20 minutes |
+30 °C | ~ 15 minutes |
+5 °C | ~ 30 minutes |
Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.
Waiting Time / Overcoating
Before applying Sikafloor®-2640 on Sikafloor®-2640 allow:
Temperature | Minimum | Maximum |
+5 °C | ~18 hours | ~3 days |
+10 °C | ~15 hours | ~3 days |
+20 °C | ~6 hours | ~48 hours |
+30 °C | ~3 hours | ~24 hours |
Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.
Applied Product Ready for Use
Temperature | Foot traffic | Light traffic | Full cure |
+5 °C | ~18 hours | ~36 hours | ~3 days |
+10 °C | ~15 hours | ~18 hours | ~24 hours |
+20 °C | ~6 hours | ~11 hours | ~14 hours |
+30 °C | ~3 hours | ~9 hours | ~12 hours |
Note: Times apply when the last layer of the system has been applied. Times are affected by changing ambient conditions, particularly temperature and relative humidity.
Consumption
Function | Consumption |
Roller coat for smooth systems | 0.3–0.4 kg/m² |
Seal coat or top coat for broadcast systems | 0.6–0.8 kg/m² |
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EQUIPMENT
MIXING EQUIPMENT
Electric double paddle mixer (>700 W, 300 to 400 rpm)
APPLICATION EQUIPMENT
Squeegee
Fleece roller
SUBSTRATE QUALITY
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 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 contaminants such as dirt, oil, grease, coatings, laitance, surface treatments and loose friable material.
SUBSTRATE PREPARATION
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.
- Fully expose blow holes and voids during surface preparation to identify the required repairs.
- Remove weak cementitious substrates.
- Prepare cementitious substrates mechanically using abrasive blast cleaning, abrasive planing or scarifying equipment to remove cement laitance.
- Before applying thin layer resins, remove high spots by grinding.
- Use industrial vacuuming equipment to remove all dust, loose and friable material from the application surface before applying the Product.
- 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.
MIXING
MIXING PROCEDURE
- Mix Part A (resin) until the coloured pigment is dispersed and a uniform colour is achieved.
- Add Part B (hardener) to Part A.
- IMPORTANT Do not mix excessively. Mix Part A + B continuously for ~3 minutes until a uniformly coloured mix is achieved.
- To ensure thorough mixing, pour materials into another container and mix again to achieve a smooth and uniform mix.
- 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.
APPLICATION
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
Foaming due to exothermic reaction
After the end of the Product's pot life the exothermic reaction of the Product leads to foaming.
- At the end of the Product's pot life, fill the container completely with quartz sand to stop the exothermic reaction.
IMPORTANT
Ensuring consistent colour matching
For consistent colour matching, make sure the Product in each area is applied from the same control batch numbers.
IMPORTANT
Damaged finish due to heating with fossil fuel heaters
Fossil fuel heaters powered by gas, oil or paraffin produce large quantities of both carbon dioxide and water vapour, which may adversely affect the finish.
- For temporary heating, use only electrically powered warm air blower systems. Do not use gas, oil, paraffin or other fossil fuel heaters.
ROLLER COATING
- Pour the Product onto the surface.
- Apply the Product in two directions at right angles with a short-pile roller, brush, or squeegee. Note Maintain a "wet edge" during application to achieve a seamless finish.
SEAL COAT FOR BROADCAST SURFACES
- Pour the mixed Product onto the substrate. Note The consumption is specified in Application Information.
- Spread the Product evenly over the surface with a squeegee.
- Back roll the surface in two directions at right angles with a medium pile roller. Note Maintain a "wet edge" during application for a seamless finish.
CLEANING OF TOOLS
Clean all tools and application equipment with Sika® Thinner C immediately after use. Hardened material can only be removed mechanically.