Product Data Sheet Show all documents
Sikalastic® M 808

Sikalastic® M 808

(former MasterSeal® M 808)

Elastic polyurethane membrane for waterproofing and protection of concrete structures. Suitable for direct contact with potable water and foodstuff

Sikalastic® M 808 is a two component elastic polyurethane membrane, with 100% solids formulation, high chemical and abrasion resistance. Approved for direct contact with potable water and foodstuff.

  • Can be applied on vertical and horizontal surfaces.
  • Easy to apply by roller or air-less spray equipment. 
  • Waterproof.
  • Resistant to standing water.
  • Elastic, flexible and crack-bridging.
 
  • High chemical resistance.
  • Protects concrete against carbonation and rebar corrosion: Once hardened it is impermeable to water and carbon dioxide.
  • Excellent mechanical and elastic properties (elongation, tensile and tear strength, abrasion).
  • Excellent adhesion on different substrates (concrete, steel).
  • Excellent freeze/thaw resistance.
  • UV resistant
  • Thermoset – does not soften at elevated temperatures.
  • 100% solids formulation, no risk for the environment and operative caused by solvent vapours. 
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Product Data Sheet Show all documents

Usage

Sikalastic® M 808 is used in waterproofing applications where contact with potable water or a high level of chemical resistance is required. This includes:
  • Water towers, storage tanks or any other water retaining structures.
  • Interior coating to drinking water tanks.
  • Storage tanks containing foodstuffs etc.
  • Waste water treatment plants (urban and industrial), both in the inflow and outflow areas.
  • Sewage effluent pipelines.
  • Steel and concrete pipes.
Sikalastic® M 808 can be applied on:
  • Horizontal and vertical substrates.
  • Internal and external areas.
  • Concrete, cementitious mortar or steel substrates.
  • Reinforced concrete to protect it against carbonation or chloride induced corrosion and for protection against chemical attack in secondary containment bunds in chemical and petrochemical industries.

Advantages

  • Can be applied on vertical and horizontal surfaces.
  • Easy to apply by roller or air-less spray equipment. 
  • Waterproof.
  • Resistant to standing water.
  • Elastic, flexible and crack-bridging.
 
  • High chemical resistance.
  • Protects concrete against carbonation and rebar corrosion: Once hardened it is impermeable to water and carbon dioxide.
  • Excellent mechanical and elastic properties (elongation, tensile and tear strength, abrasion).
  • Excellent adhesion on different substrates (concrete, steel).
  • Excellent freeze/thaw resistance.
  • UV resistant
  • Thermoset – does not soften at elevated temperatures.
  • 100% solids formulation, no risk for the environment and operative caused by solvent vapours. 

Packaging

Part A

8.88 kg drums

Part B

4.62 kg drums

Refer to current price list for packaging variations.

Colour

Grey and light grey

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • CE Marking and Declaration of Performance to EN 1504-2 - Surface protection product for concrete - Coating

  • Approved by the Secretary of State for Environment under Regulation 31(4) (a) for use in contact with po-table water. Specific instructions for use available on request. (UK)

  • WRAS approved for use in contact with potable water - approval no 1210500 (UK)

  • Approved for contact drinking water according RD 140/2003 (Spanish transposition of European directive 98/83/EC)

  • Approved for contact with potable water according to EU No. 10/2011 and EU 2020/1245.

  • Approved for contact with potable water according to Italian Ministerial Decree DM 174 of April 2004.

  • Tested according EN 12872. Influence of materials on water intended for human consumption - Influence due to migration.

  • Tested according EN ISO 4628/2004 (500 h) - accelerated corrosion test in saline mist chamber. 

 
Product Information

Shelf Life

Part A & Part B: 12 months from date of production

Storage Conditions

The product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +10 °C and +25 °C. Do not expose to direct sunlight. Always refer to packaging.

Density

Mix

~1.2 kg/l

Values at +20 °C

Viscosity

Temperature

Part A

Part B

+ 23°C

2680 mPas

450 mPas
Technical Information

Shore D Hardness

70

(EN ISO 868/07)

Abrasion Resistance

Mass loss < 350 mg (required < 3000)

(EN ISO 5470-1)

Resistance to Impact

20 Nm

(EN ISO 6272/2)

Tensile Strength

> 20 N/mm2

(EN ISO 527-1/-2)

Crack Bridging Ability

A4

+23°C

Static

A3

-10°C

A2

-20°C

Adhesion in peel

3.8 N/mm2

(EN 1542)

Capillary Absorption

0.001 kg/m2∙h0.5 (required < 0.1)

(EN 1062-3)

Permeability to Water Vapour

6.2 m (class II 5 < SD < 50)

(EN ISO 7783)

Permeability to CO2

74 m (required > 50)

(EN 1062-6)

Behaviour after Artificial Weathering

no changes

(EN 1062-11)

Application

Application Information

Mixing Ratio

Part A : Part B = 100 : 52 (by weight)

Product Temperature

+10 °C min. / +35 °C

Ambient Air Temperature

+10 °C min. / +35 °C

Relative Air Humidity

≤ 70 %

Substrate Moisture Content

≤ 4 %

Pot Life

~ 20 - 25 minutes (at +20°C)

 

Curing Time

Final cure after 7 days at +20 °C 

Time is approximate and will be affected by changing ambient conditions particularly temperature and relative humidity. 

Tack Free Time

~ 6 hours (at +20°C)

Waiting Time / Overcoating

~ 6 hours (at +20°C)
Consumption

Consumption

0.4 – 0.8 kg/m² in two coats
Application steps

EQUIPMENT

Reference must be made to the Sika® Method Statement: Sikalastic® M 808

SUBSTRATE QUALITY

Reference must be made to the Sika® Method Statement: Sikalastic® M 808

SUBSTRATE PREPARATION

Reference must be made to the Sika® Method Statement: Sikalastic® M 808

APPLICATION

Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions. Prior to application, confirm substrate moisture content, relative air humidity, dew point, substrate, air and product temperatures.Reference must be made to the Sika® Method Statement: Sikalastic® M 808

CLEANING OF TOOLS

Clean all tools with Thinner C immediately after use. The application equipment must cleaned and filled with Mesamoll. Hardened material can only be removed mechanically.

 

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