Product Data Sheet Show all documents

Sikalastic® M 689 AE

(former MSeal M 689)

A highly elastic, ultra-fast curing, spray applied pure polyurea membrane, for use in water-proofing applications.

Sikalastic® M 689 AE is a 2- part, solvent-free, pure polyurea, hot spray applied, elastic, very fast curing, waterproofing and protection membrane. The fast curing allows an immediate return-to-service time and the spray application allows fast coverage of the substrate. Suitable for use in hot and tropical climatic conditions. 

  • Low viscosity
  • Excellent bond to substrate
  • Easy application to complicated details
  • Rapid curing
  • Continuous membrane, monolithic – no laps, welds or seams
  • Resistant to standing water
  • Fully bonded to substrate, can be applied to a wide range of substrates with the appropriate primer
  • High impact resistance
  • High elasticity and crack bridging capability
  • Thermoset – does not soften at high temperature
  • Approved for potable water contact
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Product Data Sheet Show all documents

Usage

Sikalastic® M 689 AE may only be used by experienced professionals.
It is used in a variety of waterproofing applications, especially where a high degree of chemical and mechan-ical resistance is required.   This includes:
  • Waste water treatment plants (urban and industrial), both in the inflow and outflow areas.
  • Sewage effluent pipelines.
  • Steel and concrete pipes.
  • Secondary containment bunds in chemical and petro-chemical industries
Additionally, Sikalastic® M 689 AE 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, chloride induced corrosion or chemical attack in industrial environments.
  • Where color stability is required, polyurea membrane can be overcoated with UV protective top coat.
Contact your local Sika representative regarding any other application which is not advised above.  

Advantages

  • Low viscosity
  • Excellent bond to substrate
  • Easy application to complicated details
  • Rapid curing
  • Continuous membrane, monolithic – no laps, welds or seams
  • Resistant to standing water
  • Fully bonded to substrate, can be applied to a wide range of substrates with the appropriate primer
  • High impact resistance
  • High elasticity and crack bridging capability
  • Thermoset – does not soften at high temperature
  • Approved for potable water contact

Packaging

Part A (Polyamine):~200 kg in 200 L drums

Part B (Isocyanate):~225 kg in 200 L drums

Colour

Light grey

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

  • WRAS drinking water approval no. 240455060: April 2024 for use with hot water up to 70 °C.  

Product Information

Composition

~100 % polyurea

Shelf life

Part A: 12 months from date of production
Part B: 9 months from date of production

Storage conditions

Store in a dry area in original sealed packaging at temperatures between +15 °C and +25 °C. Protect from direct sunlight, heat and moisture.

Density

Values at +25°C

Part A

~1.00 kg/l

Part B

~1.12 kg/l
Technical Information

Shore A hardness

~90

(ASTM D2240)

Shore D Hardness

~40

(ASTM D2240)

Resistance to impact

~20 Nm (EN ISO 6272/2)

Tensile strength

~16 N/mm2

(ISO 527-1)

Elongation

~340 %

(ISO 527-1)

Tensile adhesion strength

Concrete≥ 3 N/mm2
(or concrete failure)
Metal≥ 3 N/mm2

Tear strength

~80 N

(DIN 53515)

Membrane thickness: 1.5 mm

Crack bridging ability

3.2 mm(ASTM C1305)

Chemical resistance

Resistant to many chemicals. Contact Sika Technical Services for additional information.

Behaviour after artificial weathering

Pass

(EN 1062)

Service temperature

-20 °C min. / +130 °C max.

Dry

0 °C min. / +80 °C max.

High moisture, but not wet

0 °C min. / +55 °C max.

Wet

Application

Application Information

Mixing ratio

100 : 100 by volume
100 : 112 by weight

Relative air humidity

Max. 85 %

Substrate temperature

Min. 5 °C / Max. 50 °C

 

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).

Open Time

5 - 7 seconds

Tack free time

~30 seconds at 25 °C

Applied product ready for use

~12 hours at 25 °C

Drying time

~30 minutes at 25 °C
Consumption

Consumption

Sikalastic® M 689 AE is normally applied at 2.2 - 2.8 kg/m². This corresponds to a thickness of approx. 2.0 - 2.5 mm.
Note: These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage.
Application steps

EQUIPMENT

Mixing and spraying

  • Drum stirrer
  • Air driven or electrical 2-Component heated spray equipment

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 689 AE 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 refer to particular primer product data sheet.
Concrete and cementitious screeds:
Concrete and other cementitious substrates must have a minimum pull off strength of 1.5 N/mm². Any laitance present on the surface must be removed mechanically. Shot blasting is the preferred method. Release oil and other contaminants which may impair adhesion must be removed prior to the application of the primer.
Metal substrate:
Should be sand blasted to a Sa 2 ½ finish prior to application of the primer.

MIXING

Dose and mix with suitable air driven or electrical twopart 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 689 AE can only be applied by means of a suitable two component heated, high pressure, proportioning spray equipment (e.g. Graco® or any other suitable). The choice of machine depends to a large extent on the type and size of work contemplated.
For advice, please contact Technical Service Department.
Sikalastic® M 689 AE should only be applied to properly prepared substrates. For best results substrate and air temperature should be in a range 5- 40°C.
Sikalastic® M 689 AE should be applied within the recommended temperature and relative humidity limits.
The temperature of the substrate should be min. 3°C above the dew point.
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 to prevent spray mist being carried by wind by suitable barrier.

CLEANING OF EQUIPMENT

Re-useable tools should be cleaned carefully with a suitable thinner (Xylene / MEK / Acetone). Hardened material can only be removed mechanically.

 

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