Sikalastic®-590

Polyurethane modified acrylic dispersion.

12 months from date of production if stored properly in original, unopened and undamaged sealed packaging.

The product must be stored properly in dry conditions at temperatures between +5 °C and +30 °C.

~63 % by weight

WATERPROOFING WITHOUT REINFORCEMENT

• For UV-stable coating for extend life old roofs or as reflective coating to enhance energy efficiency.
• For detail system build up, please refer to table below :

WATERPROOFING WITH REINFORCEMENT (SIKA®-120 REEMAT)

• For cost efficient waterproofing solutions in new construction and refurbishment projects.
• Sika®-120 Reemat is applied at areas with movements, irregular substrate or to bridge cracks, joints and seams on the substrate as well as for details.
• For detail system build up, please refer to table below :

* It may not be applied, if the substrate is good and the primer has covered substrate with proper consumption and enough material.

+15 °C min / +35 °C max

80 % r.h. max

+15 °C min / +35 °C max

Beware of condensation, Surface temperature during application must be at least 3 °C above dew point.

< 6 % moisture content.
No rising moisture according to ASTM (Polyethilene-sheet)
No water / moisture / condensation on the substrate.

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

Before applying Sikalastic®-590 on Sikalastic®-590 (without reinforced), allow 1^st coat to dry:

Before applying Sikalastic®-590 on Sikalastic®-590 (reinforced WITH Sika®-120 Reemat), allow material to dry:

*Note 1 : After thorough cleaning Sikalastic®-590 can be overworked with it self at any time

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

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 e.g. grinding.
• Outgassing is a naturally occurring phenomenon of concrete that can produce pinholes in subsequently applied coatings. The concrete must be carefully assessed for moisture content, air entrapment, and surface finish prior to any coating work. Installing the membrane either when the concrete temperature is falling or stable can reduce outgassing. It is generally beneficial, therefore, to apply the embedment coat in the late afternoon or evening.
• Prime the substrate and always 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.
 

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.
 

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 and always use a totally reinforced system.

Bituminous Coatings:
 

Bituminous coatings should not have sticky or mobile surfaces, volatile mastic coatings, or old coal tar coatings. Prime and always use a totally reinforced system.
 

Metals:
 

Metals should be in sound condition. Abrade the exposed surfaces to reveal bright metal. Use locally reinforcement over joints and fixings.
 

Wooden substrates:
 

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

Paints/Coatings:
 

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

Prior to application, stir Sikalastic®-590 thoroughly for 1 minute in order to achieve a homogeneous mixture. Over mixing must be avoided to minimise air entrainment.

Prior the application of Sikalastic®-590, the priming coat has to be used and it must have cured tack-free. The primer coat is Sikalastic®-590 diluted 10 % water and consumption is ~0.3 kg/m²

For the Waiting Time / Overcoating please refer to the PDS of the appropriate primer. Damageable areas (door frame) have to be protected with an adhesive tape.

Waterproofing WITHOUT Sika®-120 Reemat:
Sikalastic®-590 is applied in three coats (1 coat is for primer coat & 2 coats are Sikalastic®-590). Prior to the application of second coat the indicated waiting time in the table Waiting Time / Overcoating shall be allowed.

Waterproofing WITH Sika®-120 Reemat:

• Apply primer Sikalastic®-590 diluted with 10% water, consumption approximately 0.3 kg per m².
• Apply first coat* of approximately 0.3 kg per m².
• Apply second coat of approximately 0.5 kg/m² of Sikalastic®-590. Work only so far in advance that the material stays liquid.
• Roll in the Sika®-120 Reemat and push into the wet liquid and ensure full saturation. Overlapping of the Sika®-120 Reemat a minimum 5 cm and ensure overlaps are sufficiently wet to bond. 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. Then apply approximately 0.5 kg per m² of Sikalastic®-590 with wet on wet system.
• Before applying the final coat, check for upstanding Reemat fibres. These fibres have to be eliminated by using sandpaper. Make sure that all upstanding fibres are abraded.
• After the coat is dry enough to walk on, Final coat of approximately 0.3 – 0.5 kg per m² of Sikalastic®-590.

Note : * It may not be applied, if the substrate is good and the primer has covered substrate with proper consumption and enough material.

TOOLS
 

Drill and paddle:
Sikalastic®-590 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 to ensure a consistent thickness of the seamless SikaRoof systems.

Thick hair brush:
For application of Sikalastic®-590 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

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