Product Data Sheet Show all documents

Sikafloor® M 869

(former MSeal M 869)

2-Part PU membrane and wear coat for car park deck coatings, highly elastic

Sikafloor® M 869 is a hand applied, two-component, self-levelling polyurethane based, elastomeric coating.

  • excellent crack bridging capability
  • useable as membrane and wear coat
  • tenacious hold to broadcast aggregate
  • withstands loads imposed by traffic
  • resistant to fuels, battery acid and hydraulic oils
Product Data Sheet Show all documents

Usage

Sikafloor® M 869 forms the waterproofing membrane in those car park deck waterproofing systems which meet the requirements of the German OS 11 (OS F) specification for coatings with enhanced dynamic crack bridging properties capable of bearing pedestrian and vehicular traffic according to the Guidelines for the Protection and Repair of Concrete Components as issued by the German Committee on Reinforced Concrete. In addition, Sikafloor® M 869 can be used in other systems and combinations in waterproofing applications.  

Advantages

  • excellent crack bridging capability
  • useable as membrane and wear coat
  • tenacious hold to broadcast aggregate
  • withstands loads imposed by traffic
  • resistant to fuels, battery acid and hydraulic oils

Packaging

Sikafloor® M 869 is supplied in 30 kg working packs.

Colour

Sikafloor® M 869 is available in grey (approx. RAL 7032).

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

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

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
Product Information

Chemical Base

Polyurethane

Shelf Life

Under the specified storage conditions the material has a shelf life of 12 months. For maximum shelf life under these conditions see "Best before" label.

Storage Conditions

Store in original containers under dry conditions at a temperature between 15 – 25 °C. Do not expose to direct sunlight and keep the temperatures within the abovementioned range.

Density

Cured 28 days at 23°C

1.20 g/cm3

 
Technical Information

Shore A Hardness

Cured 28 days at 23°C

72

Tensile Strength

Cured 28 days at 23°C

6.0 N/mm2

(DIN 53504)

Tear Strength

Cured 28 days at 23°C

20 N/mm2

Application

Application Information

Mixing Ratio

1 : 2

Ambient Air Temperature

Min.

5°C

Max.

30°C

Relative Air Humidity

Max.

80%

Substrate Temperature

Min.

5°C

Max.

30°C

Open Time

at 10°C

40 min

at 20°C

30 min

at 30°C

20 min

Waiting Time / Overcoating

Temperature

Minimum

Maximum

at 10°C

12 hours

3 days

at 20°C

9 hours 

2 days

at 30°C

6 hours

1 day
Consumption

Consumption

For application specific consumptions, see individual System Data Sheets.
Application steps

SUBSTRATE PREPARATION

The preparation of the substrate and the use of the appropriate primer are of paramount importance. All surfaces to which Sikafloor® M 869 is applied should be sound, clean and dry and free from oil or grease, loose particles and any other substances which may impair adhesion. For substrate pre-treatment prior to the primer application see primer technical data sheet.

MIXING

Sikafloor® M 869 is supplied in working packs which are pre-packaged in the exact ratio. Before mixing, precondition both the A and B components to a temperature of approximately 15 to 25 °C.

Pour the entire contents of Part A into the container of Part B. DO NOT MIX BY HAND. Mix with a mechanical drill and paddle at a low speed (approx. 300 rpm) for at least 3 minutes. Scrape the sides and the bottom of the container several times to ensure complete mixing. Keep the mixer bladed fully submersed in the coating to avoid introducing air bubbles. DO NOT WORK OUT OF THE ORIGINAL CONTAINER. After proper mixing to a homogeneous consistency, pour the mixed Parts A and B into a clean container and mix for a further minute.

APPLICATION

Sikafloor® M 869 is poured onto the prepared substrate and spread with a notched trowel or spreader (rubber or steel).

The curing time of the material is influenced by the ambient, material and substrate temperatures. At low temperatures, the chemical reactions are slowed down, this lengthens the pot-life, open time and curing times. High temperatures speed up the chemical reactions thus the time frames mentioned above are shortened accordingly. To fully cure, the material, substrate and application temperatures should not fall below the minimum. After application, the material should be protected from direct contact with water. The temperature of the substrate must be at least 3 K above the dew point both during and for at least 9 hours after application (at 15 °C).

 

CLEANING OF TOOLS

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

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