Product Data Sheet Show all documents

Sikalastic® M 811 R ME

Two-component, spray-applied, polyurea / polyurethane hybrid roof waterproofing membrane

Sikalastic® M 811 R ME is a two-component polyurea / polyurethane hybrid waterproofing membrane. It is highly reactive with rapid setting time and needs to be applied by special, two-component spray machine. Sikalastic® M 811 R ME cures to form an elastic, crack-bridging, seamless, waterproofing membrane. Suitable for use in hot and tropical climatic conditions.

  • Total solids
  • Fast application - application with two-component hot spray equipment
  • Easy application to complicated details
  • Fast curing with short overcoating time
  • Seamless waterproofing membrane
  • Elastic and crack bridging
  • Excellent mechanical properties
  • Good adhesion to most substrates
  • Resistant to standing water
  • Thermoset – does not soften at elevated temperatures
Inquire Now
Product Data Sheet Show all documents

Usage

Sikalastic® M 811 R ME may only be used by experienced professionals.
  • For use as a waterproofing membrane on flat and pitched roof structures with an additional top coat for UV-protection on exposed conditions.
  • For use as a waterproofing membrane underneath planting or hard landscaping on podium areas.
 
  • For use as a waterproofing membrane for other concrete structures and on non-trafficked concrete areas with an additional top coat for UV-protection.

Advantages

  • Total solids
  • Fast application - application with two-component hot spray equipment
  • Easy application to complicated details
  • Fast curing with short overcoating time
  • Seamless waterproofing membrane
  • Elastic and crack bridging
  • Excellent mechanical properties
  • Good adhesion to most substrates
  • Resistant to standing water
  • Thermoset – does not soften at elevated temperatures

Packaging

Component A (Resin)200 kg drum
Component B (Iso)200 kg drum

Colour

Component A (Resin)liquid / grey
Component B (Iso)liquid / clear (yellowish)

Cures to a grey membrane. UV light exposure may lead to yellowing.

Product Details

Product Information

Composition

Polyurea / polyurethane hybrid

Shelf life

Component A (Resin)12 months from date of production
Component B (Iso)12 months from date of production

Storage conditions

The product must be stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Higher storage temperatures may reduce shelf life of product. Reference shall also be made to the storage recommendations within the safety data sheet.

Density

Component A (Resin)1.03 g/cm³
Component B (Iso)1.10 g/cm³

Values at +25 °C

Solid content

~100 %
System information

System structure

Layer

ProductConsumption

1. Primer

Refer to Substrate-Primer table below

Refer to PDS of the primer

2. Waterproofing

Sikalastic® M 811 R ME

≥ 1.60 kg/m²

3. UV protection

(Required when exposed to UV Light)

Sikalastic®-701

≥ 0.30 kg/m²
Technical Information

Shore A hardness

~85

(ASTM D2240)

Tensile strength

~10 MPa

(ASTM D412)

Test Method A - Die C

Tear strength

~50 kN/m

(ISO 34–1)

Application

Application Information

Mixing ratio

1:1 by volume

Material temperature

Component A (Resin)~60 – 80 °C
Component B (Iso)~60 – 80 °C
Hose~70 °C

Ambient air temperature

+5 °C min. / +50 °C max.

Relative air humidity

85 % max.

Dew point

Beware of condensation.

The substrate and uncured applied membrane must be at least +3 °C above dew point.

Substrate temperature

+5 °C min. / +50 °C max.

Substrate moisture content

≤4 % parts by weight.

The following test methods can be used:

Sika®-Tramex meter, CM-measurement or Oven-dry-method.

No rising moisture according to ASTM (Polyethylene-sheet).

Substrates

Suitable substrates: Concrete, bituminous felts and coatings, metal, brick masonry, ceramic tiles.

Note: Suitable primer selection and correct substrate preparation is important. Contact Sika Technical Service Department for recommendations.

Tack free time

~10 minutes

Waiting time to overcoating

When building up thickness of Sikalastic® M 811 R ME allow:

Minimum waiting timeMaximum waiting time
Immediate~24 hours

Before applying suitable topcoats allow:

Minimum waiting timeMaximum waiting time
~2 hours~24 hours

Applied product ready for use

~24 hours

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

Gel time

~15 seconds at 25 °C

 
Application steps

EQUIPMENT

Mixing and spraying

  • Drum stirrer
  • High-pressure, two-component, heated spray equipment. The choice of machine depends to a large extent on the type and size of work contemplated

Contact Sika Technical Services for recommendation.

SUBSTRATE PREPARATION

The preparation of the substrate and the use of the appropriate primer are of paramount importance. All surfaces to which Sikalastic® M 811 R ME will be applied must be sound, clean, dry and free from oil or grease, loose particles and any other substances which may impair adhesion.

MIXING

Dose and mix with suitable two-part hot spray equipment. The accuracy of mixing and dosage must be controlled regularly with the equipment. Stir well PTA drums before use to homogenise the content. Precondition the membrane components to the correct temperature 70–80 °C prior to application. Check mix ratios are correct at the start of spraying and regularly throughout the spraying procedure.

APPLICATION

Sikalastic® M 811 R ME can only be applied by means of a suitable two component heated, high pressure, proportioning spray equipment.

Sikalastic® M 811 R ME should only be applied to properly prepared substrates. Prior to application, confirm substrate moisture content, relative air humidity, dew point, substrate, air and product temperatures.

Due to the fast reaction, it is possible to rapidly build thicknesses. Surrounding areas should be protected from overspray by masking off. Care should be taken by using suitable barrier to prevent spray mist being carried by wind.

Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions. Reference must be made to Sikalastic® M 811 R ME General Method Statement.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with a suitable thinner (Xylene / MEK / Acetone) immediately after use. Hardened material can only be removed mechanically. Sikalastic® M 811 R ME is a highly reactive material, thus, proper cleaning and maintenance of spray equipment is important.

 

Documents