Mixing ratio

Ambient air temperature

+10 °C min. / +40 °C max.

Relative air humidity

80 % max.

Dew point

Beware of condensation.

Substrate temperature and uncured material during application must be at least +3 °C above dew point.

Substrate temperature

+10 °C min. / +40 °C max.

Substrate moisture content

< 6 % 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).
No water / moisture / condensation on the substrate.

Waiting time / Overcoating

Before applying Sikalastic®-590 IN on Sikalastic®-590 IN diluted with 10 % water as primer allow:

Before applying Sikalastic®-590 IN on Sikalastic®-590 IN (without reinforcement) allow:

Before applying Sikalastic®-590 IN on Sikalastic®-590 IN (reinforced with Sika® Fabric-50 or Sika® Reemat Premium-225) allow:

* Note 1: After thorough cleaning Sikalastic®-590 IN can be overcoated with itself at any time.

Applied product ready for use

Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity. Low temperature and high relative humidity retard curing, while high temperature and low relative air humidity accelerate curing progression.

APPLICATION INSTRUCTIONS

IMPORTANT
Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

EQUIPMENT

Drill and paddle:
Sikalastic®-590 IN should be mixed for one minute using a drill and paddle.

Solvent resistant short-piled lamb skin roller:
Used in the application of Sikalastic®-590 IN to ensure a consistent thickness of the seamless SikaRoof systems.

Thick hair brush:
For application of Sikalastic®-590 IN to all details and penetrations.

Jet washer:
If dust, vegetation, moss / algae or other contaminants are present on the existing roof, a power washer is required to clean the substrate prior to the application of SikaRoof Systems. Existing chippings should be removed by hand or scabbling prior to power washing.

Airless spray equipment:
Used only for the roof coating systems. Two spray applied layers is the minimum requirement. The pump should have the following parameter:
-min. pressure: 220 bar
-min. output: 5.1 L/min
-min. Ø nozzle: 0.83 mm (0.033 inch)
For example: Wagner Heavycoat HC 940 E SSP Spray pack

SUBSTRATE PREPARATION

Cementitious substrate:

• New concrete should be cured for at least 28 days and should have a pull off strength ≥ 1.5 N/mm².
• Cementitious or mineral based substrates must be prepared mechanically using abrasive blast cleaning or scarifying equipment to remove cement laitance and to achieve an open textured surface.
• Loose friable material and weak concrete must be completely removed and surface defects such as blowholes and voids must be fully exposed.
• Repairs to the substrate, filling of joints, blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor®, Sikadur® and Sikagard® range of materials.
• High spots must be removed by grinding.
• Prime the substrate and preferably use a reinforced system.

Brick and stone:

• Mortar joints must be sound and preferably flush pointed. Use localized reinforcement over joints and prime before applying Sikalastic®-590 IN.

Slates, tiles, etc.:

• Ensure all slates/tiles are sound and securely fastened, replacing obviously broken or missing sections.
• Fully glazed tiles must be abraded prior to priming and subsequent treatment with Sikalastic®-590 IN.

Bituminous felt:

• Ensure that bituminous felt is firmly adhered or mechanically fixed to the substrate. Bituminous felt should not contain any badly degraded areas.
• Prime with SikaShield® Primer S-30 IN and always use a fully reinforced system.

Bituminous coatings:

• Bituminous coatings should not have sticky or mobile surfaces, volatile mastic coatings, or old coal tar coatings. Prime with SikaShield® Primer S-30 IN and always use a fully reinforced system.

Metals:

• Metals should be in sound condition. Abrade the exposed surfaces to reveal bright metal. Use reinforcement locally over joints and fixings. Prime with Sikalastic®-10 Primer EP broadcasted with quartz sand and use an unreinforced system.

Wooden substrates:

• Timber and timber based panel roof decks are to be in good condition, firmly adhered, or mechanically fixed.

Paints or Coatings:

• Ensure the existing material is sound and firmly adhered. Remove any oxidized layers and use localized reinforcement over joints.

MIXING

Primer

1. Stir Sikalastic®-590 IN thoroughly for 1 minute before dilution.
2. Pour into a clean container and mix in the appropriate amount of water.

Coating

1. Stir Sikalastic®-590 IN thoroughly for 1 minute in order to achieve a homogeneous mixture.

Note: Overmixing must be avoided to minimise air entrainment.

APPLICATION

IMPORTANT

Do not apply on roofs with improper slopes leading to long ponding.

1. Sikalastic®-590 IN can be applied on properly sloped roofs subject to short ponding water. Recommended slope of 1 % should be provided to substrate (depending on roof layout and availability of drains and gutters, minimum could be 0.5 % slope).

IMPORTANT

In cold climatic zones, do not apply on roofs subject to ponding water with subsequent periods of frost, otherwise provide slope of more than 3 % or consider using appropriate measures.

IMPORTANT
Do not apply on substrates with rising moisture.

IMPORTANT
Protect the coating from damp, condensation and direct water contact for at least 24 hours to get good ponding water capability.

IMPORTANT
If applied on porous substrates during rising temperatures pin holes may occur from rising air.
1. Apply during falling temperatures.

IMPORTANT

Do not allow temporary ponding to remain between coats on any horizontal surfaces or until the final coating has totally cured.

1. Brush or mop surface water away during this time.

Primer:

1. Apply diluted primer onto the prepared substrate by squeegee, roller, paint brush, or suitable spraying equipment. Ensure a continuous, pore free coat covers the substrate.
2. (Optional) Apply second coat of primer on very absorbent substrates.

Note: Confirm waiting /overcoating time has been achieved before applying subsequent products.

  
Waterproofing without reinforcement:

1. Apply first coat directly from container by roller or brush or spray.
2. Apply second coat in same way as first coat preferably applied in cross direction to first coat.
3. (Optional) Apply seal coat for special cases where an aesthetic finishing is required.

Note: Confirm waiting /overcoating time has been achieved before applying subsequent products.

Waterproofing with reinforcement:

1. Apply first coat directly from container by roller or brush.
2. Roll in the Sika® Fabric-50 or Sika® Reemat Premium-225. Overlap it a minimum 5 cm and ensure overlaps are sufficiently wet to bond both layers.
3. Over roll the treated area until the reinforcement is completely embedded in the base coat. The roller may require only a little extra material to keep wetted but no further significant material needs to be added at this stage. The surface of the reinforcement should look wet and fully sealed.
4. Apply second coat in same way as first coat preferably applied in cross direction to first coat.
5. (Optional) Apply seal coat for special cases where an aesthetic finishing is required.

Note: Always begin with details prior starting with waterproofing the horizontal surface.

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically.