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Repair Bitumen Roof Liquid Membrane:     

Sikalastic-560 is a cold-applied, one-component waterborne liquid applied waterproofing membrane, highly elastic and UV-resistant.       Economical and eco-friendly liquid applied roof waterproofing solution based on Sika Co-Elastic Technology (CET)



For roof waterproofing solutions in both new construction and refurbishment projects    

For roofs with many details and complex geometry when accessibility is limited    

For cost efficient life cycle extension of failing roofs    

For reflective coating to enhance energy efficiency by reducing cooling costs    


Characteristics / Advantages    

UV resistant and resistant to yellowing and weathering    

Highly elastic and crack-bridging    

Non-toxic and VOC compliant water based coating    

One component - ready to use    

Excellent adhesion on porous and non porous substrates    

Seamless waterproofing membrane    

Water vapour permeable    

12 months shelf life    

Approved in accordance with AS 4020 and AS 4858    

Approval for Use in Potable Water and Wet Area applications.    



Approval / Standards    

Fulfils requirements acc. ETAG-005 Part 8    

Fulfils initial solar reflectance requirements acc. Energy Star (0.820)    

Meets requirements of external fire performance ENV 1187 BRoof (T1) on noncombustible substrates    



Appearance / Colours: Grey, terracotta, red and white (Energy Star)    

Packaging: 15 litre plastic pails    



Storage Conditions / Shelf Life    

12 months from date of production if stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 C and +30 C.    


Technical Data    


Chemical Base

Polyurethane modified Acrylic Dispersion    


1.35 kg/l (EN ISO 2811-1)    

All density values at +23 C


Solid Content

~ 48% by volume / ~ 65% by weight    

Service Temperature

-10 C to +80 C (with fleece)    

-5 C to +80 C (without fleece)


CIGS- Reflectance (initial)

87% according to EN 410 in conjunction with CIGS sensitivity    

Solar Reflectance (initial)

0.82 according to ASTM C 1549    

Initial Emittance       

0.93 according to ASTM E 408, C1371, others    

SRI (Solar Reflectance Index) (Initial)

102 according to ASTM E 1980    


All values related to the reflectance/emittance properties provided in this Product Data Sheet refer to the initial (properly cured, non-weathered) status of the product.    


Mechanical / Physical Properties    


Tensile Strength    

Free film: ~ 1.5 N/mm2 (DIN 53504)    

With Sikalastic Fleece-120: ~ 12 N/mm2 (DIN 53504)    

Elongation at Break    

Free film: ~ 350% (DIN 53504)    

With Sikalastic Fleece-120: ~ 40-60% (DIN 53504)    


System Information   System Structure    

System Information   System Structure    


Roof Coating    

For UV-stable coating, for extend life of old roofs or as reflective coating to enhance energy efficiency.    


Build up:

Sikalastic-560 applied in one or two coats    


Concrete, metals, wood, tiles    


Please refer to Sikalastic Primer-Cleaner chart below    

Total thickness:

~ 0.3 - 0.5 mm    

Total consumption:

~ 0.9 - 1.4 kg/m2    


Roof Waterproofing    

For cost efficient waterproofing solutions in new construction and refurbishment projects.    


Build up:    

Sikalastic-560 applied in two coats and reinforced with    

Sikalastic Fleece-120 and sealed with one or two additional    

coats of Sikalastic-560    


Concrete, metals, wood, tiles    


Primer: Please refer to Sikalastic Primer-Cleaner chart below    

Total thickness: ~ 1.0 - 1.3 mm    

Total consumption: ~ 2.1 - 2.8 kg/m2    


Sikalastic Fleece-120 is applied at areas with high movements, irregular substrate or to bridge cracks, joints and seams on the substrate as well as for details.    


Product Guarantee*    


3 years    


5 years    


10 years    


15 years    

Build up    



applied in one coat    



applied in one or    

more coats    


Sikalastic-560 applied    

in 2 coats, reinforced    

with Sikalastic    

Fleece-120 and    

sealed with one coat    

of Sikalastic-560    

Sikalastic-560 applied    

in 2 coats, reinforced    

with Sikalastic    

Fleece-120 and    

sealed with one coat    

of Sikalastic-560    



Sound concrete, metals, wood, tiles    

Sound concrete, metals, wood, tiles,    

bituminous membranes    


Please refer to Sikalastic Primer chart below    

Dry film thickness    

~ 0.3 mm    


~ 0.5 mm    


~ 1.0 mm    


~ 1.3 mm    


Total consumption    


>/= 0.9 kg/m2    

(>/= 0.6 l/m2 ) applied in one or more coats    

>/= 1.4 kg/m2    

(>/= 1 l/m2 )    

applied in 2 coats    


>/= 2.1 kg/m2    

(>/= 1.5 l/m2 )    

applied in 3 coats    


>/= 2.8 kg/m2    

(>/= 2.0 l/m2 )    

applied in 4 coats    



* Product guarantee is based on a minimum required purchase quantity and application through approved applicator.    


One component product. Stir before using    

UV resistant and resistant to yellowing    

Highly elastic and crack-bridging    

Vapour permeable    

Easy application by brush, roller or airless spray equipment even when accessibility is limited    

Bonds fully to most substrates, preventing the migration of water    

Seamless waterproofing membrane    

Fire resistant    

Compatible with bituminous felts    

Resistant to wind uplift    

Wide colour range available    


Application Details    

Substrate Treatment    


Cementitious substrates:    

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 localised reinforcement over joints and prime before applying Sikalastic-560.    

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-560.    


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 must be in sound condition. Abrade exposed surfaces to reveal bright metal. Use localised 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.    



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


Existing SikaRoof CET Systems:    

The existing SikaRoof CET Systems should still be soundly adhered to the substrate.    


Substrate Preparation    

Substrate Priming    




Consumption [kg/m2]    

Cementitious substrates    

Sikalastic-560 diluted with 10% water.    


Brick and Stone    

Sikalastic-560 diluted with 10% water.    


Slate, tiles, etc.    

Sikalastic-560 diluted with 10% water.    


Bituminous felt    

Sikalastic-560 diluted with 10% water.    


Bituminous coatings    

Sikalastic-560 diluted with 10% water.    



Sikalastic-560 diluted with 10% water.    


Wooden substrates    

Sikalastic-560 diluted with 10% water.    



Sikalastic-560 diluted with 10% water.    



These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage etc.    


Application Conditions / Limitations    

Substrate Temperature+8 C min. / +35 C max.    

Ambient Temperature+8 C min. / +35 C max.    

Substrate Moisture Content< 6 % moisture content.    

No rising moisture according to ASTM (Polyethylene-sheet). No water / moisture / condensation on the substrate.    

Relative Air Humidity80 % max.    

Dew Point                                       

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


Application Instructions    



Prior to application, stir Sikalastic-560 thoroughly for 1 minute in order to achieve    

homogeneous mixture.    

Over mixing must be avoided to minimise air entrainment.    


Application Method / Tools    

Application Method (please refer to the most recent issue of the Method Statement)    


Prior the application of Sikalastic-560 the priming coat must have cured tack-free. 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.    


Roof Coating:    

Sikalastic-560 is applied in two coats. Prior to the application of a 2nd coat the indicated waiting time in the table below Waiting Time / Overcoating shall be allowed.    


Roof Waterproofing:    

Sikalastic-560 is applied in combination with Sikalastic Fleece 120.    


1. Apply first coat of approximately 1.0 kg/m2 of Sikalastic-560 on a length of   approximately 1m.    

2. Roll in the Sikalastic Fleece-120 and ensure that there are no bubbles or creases. Overlapping of the fleece minimal 5 cm.    

3. Apply second coat of approximately 0.5kg/m2 coat right into the wet fleece to achieve the required film thickness. The entire application shall happen while Sikalastic-560 is still liquid, wet in wet.    

4. Repeat step 1-3 until the roof area is waterproof.    

5. After the two coats are dry, seal the roof area with one or more additional coats of Sikalastic-560 (>/= 0.5 kg/m2 per coat).    


Please note, always begin with details prior starting with waterproofing the horizontal surface. For details follow step 1-5.    




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.    



Useful when removing excess water from the roof after overnight rain    


Drill and paddle:    

Sikalastic -560 should be mixed for one minute using a drill and paddle.    


Solvent resistant short-piled lamb skin roller:    

Used in the application of Sikalastic-560 to ensure a consistent thickness of the seamless SikaRoof systems.    


Thick hair brush:    

For application of Sikalastic-560 to all details and penetrations.    


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. nozzle: 0.83mm (0.033 inch)    

For example: Wagner Heavycoat HC 940 E SSP Spraypack    


Cleaning of Tools    

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


Waiting Time / Overcoating    

Before applying Sikalastic-560 on primer Sikalastic-560 diluted with 10% water:    




Relative humidity    





+10 C    


~ 4 hours    

After thorough cleaning 1)   Sikalastic-560 can be overworked at any time    


+20 C    


~ 2 hours    

+30 C    


~ 1 hour    


Before applying Sikalastic-560 on Sikalastic-560 (without fleece)    

allow 1st coat to dry:    




Relative humidity    






+10 C    


~ 8 hours    

After thorough cleaning 1) Sikalastic-560 can be overworked at any time    


+20 C    


~ 6 hours    

+30 C    


~ 4 hours    


1) Assuming that all dirt has been removed and contamination is avoided.    

Before applying Sikalastic-560 topcoat on Sikalastic-560 reinforced with fleece allow material to dry:    



Relative humidity    






+10 C    


~ 36 hours    

After thorough cleaning 1) Sikalastic-560 can be overworked at any time    


+20 C    


~ 24 hours    

+30 C    


~ 12 hours    


Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.    


Notes on Application / Limitations    


Do not apply Sikalastic-560 on substrates with rising moisture.    


Always apply during falling ambient and substrate temperature. If applied during rising temperatures "pin holing" may occur from rising air.    


Ensure that Sikalastic-560 is totally dry and the surface is without pinholes before applying any top coat.    


Do not allow temporary ponding to remain between coats on any horizontal surfaces or until the final coating has totally cured. Brush or mop surface water away during this time.    


Sikalastic-560 should not be applied on roofs subject to long-term ponding water with subsequent periods of frost. In cold climatic zones for Roofing structures with a pitch of less than 3% appropriate measures must have to be considered.    


Sikalastic-560 applied on roofs subject to long-term freezing at temperature around the minimum service temperature of -10 C should always be reinforced with SikalasticFleece-120 in order to guarantee sufficient crack-bridging ability.    


Do not apply Sikalastic-560 directly on insulation boards. Instead use a separation layer like Sikalastic-Carrier between insulation board and Sikalastic-560.    


Sikalastic Fleece-120 can be used as total reinforcement or for partial reinforcements over dynamic cracks and joints.    


Sikalastic-560 is not recommended for pedestrian traffic. In case pedestrian traffic is unavoidable, Sikalastic-560 shall be covered with appropriate elements such as tiles, stone plates or wooden panels.    


Do not apply cementitious products (e.g. tile mortar) directly onto Sikalastic-560. Use an alkaline barrier, for example kiln dried quartz sand.    


The fire resistance performance has been tested internally according to ENV 1187 BRoof (T1)    


Curing Details    


Applied Product ready for use    

Times are approximate and will be affected by changing ambient conditions    

particularly temperature and relative humidity.    




Relative humidity    


Touch dry    

Rain resistant    

Full cure    

+10 C    


~ 4 hours    

~ 12 hours    

~ 6 days    

+20 C    


~ 2 hour    

~ 8 hours    

~ 4 days    

+30 C    


~ 1 hour    

~ 4 hours    

~ 2 days    


Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.    


Value Base    

All technical data stated in this Product Data Sheet are based on laboratory tests.    

Actual measured data may vary due to circumstances beyond our control.    


Health and Safety Information    

For information and advice on the safe handling, storage and disposal of chemical    

products, users shall refer to the most recent Material Safety Data Sheet containing    

physical, ecological, toxicological and other safety-related data.


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