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Sikalastic RoofPro | Waterproofing Membrane

Sikalastic RoofPro

Sika4891
SIK4891

Sikalastic RoofPro, formerly Sikalastic 618, a one-component, cold applied, moisture-triggered polyurethane membrane. It cures to form a seamless and durable waterproofing solution for exposed roof areas and structures.

Part of the Sika Liquid Plastics range. Please contact our technical team before purchasing, on 0113 2455450 (option 2) or send a message to [email protected]

  • 10 year life expectancy
  • Ready to use on most substrates
  • Compatible with Sika Reemat Premium - easy to detail
  • Easily recoated when needed - no stripping required
  • Economical, providing a cost-efficient life cycle extension of failing roofs
  • Vapour permeable - allows substrate to breathe
  • Elastic - retains flexibility even at low temperatures
  • Fast curing - Free from rain damage almost immediately on application

Colour
Size
£400.58(incl. VAT)
£333.82(ex. VAT)
Quantity
Please choose your colour
Available for Delivery (See Delivery Options Below)

questions 1 question about the product
Description

Sikalastic RoofPro, formerly Sikalastic 618, is a one-component, cold applied, moisture-triggered polyurethane membrane. It cures to form a seamless and durable waterproofing solution for exposed roof areas and structures.

Sikalastic RoofPro may only be used by experienced professionals. Non-standard colours may be subject to minimum order quantities and extended lead times.

Part of the Sika Liquid Plastics range. Please contact our technical team before purchasing, on 0113 2455450 (option 2) or send a message to [email protected]

  • For roof waterproofing solutions in both new construction and refurbishment projects
  • For roofs displaying complex detail areas, even when accessibility is limited
  • For cost efficient life cycle extension of failing roofs



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Features & Benefits


  • 10 year life expectancy
  • Single component - No mixing, easy and ready to use
  • Cold applied - requires no heat or flame
  • Seamless membrane
  • Compatible with Sika Reemat Premium - easy to detail
  • Easily recoated when needed - no stripping required
  • Economic – provides a cost-efficient life cycle extension of failing roofs
  • Vapour permeable - allows substrate to breathe
  • Elastic - retains flexibility even at low temperatures
  • Good adhesion to most substrates – see table
  • Fast curing - Free from rain damage almost immediately on application
  • Non-standard colours may be subject to minimum order quantities and extended lead times



Approvals & Certificates


  • Liquid applied roof waterproofing kit according to ETAG 005, ETA 13/0456 issued by Technical Assessment Body British Board of Agrément (BBA), Declaration of Performance 18636122 and provided with the CE marking.
  • External fire performance according to ENV 1187:
  • BRoof (t1) / Broof (t4) on non-combustible substrates
  • BRoof (t1) / Broof (t2) over built up roofing system
  • British Standard 476 part 3 Ext F.AA rating non-combustible substrates
  • Reaction to fire according to EN13501: Euroclass E



Product Information


Composition One-component, moisture-triggered aromatic polyurethane
Colour Ral 7011 and Ral 7045 available as standard.
  Non-standard colours may be subject to minimum order quantities and extended lead times.
Shelf life 9 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 >0°C and <+25°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 ~1.38 kg/l (23°C) (EN ISO 2811-1)
Solid content by weight ~79 % (+23°C / 50 % r.h.)
Solid content by volume ~67 % (+23°C / 50 % r.h.)
Reaction to Fire Euroclass E (EN 13501)
  Ext F.AA rating Non Combustible substrates (BS 476-3)
Service Temperature -20°C min./ +90°C max.

 

Tensile Strength - (EN ISO 527-3)

  • Not Reinforced: ~ 4.6 N/mm2
  • Reinforced: ~ 18 N/mm2

 

Elongation at Break (EN ISO 527-3)

  • Not Reinforced: ~150 %
  • Reinforced: ~20 %

 

External Fire Performance (ENV 1187)

  • On non-combustible substrates - B Roof (t1) / B Roof (t4)
  • Over built up roofing system - B Roof (t1) / B roof (t2)

 

Reaction to Fire

  • Euroclass E (EN 13501)
  • Ext F.AA rating Non Combustible substrates (BS 476-3)



Systems


System Structure

  • Roof Coating
  • Reinforced Roof Waterproofing
  • Sikalastic RoofPro is applied in one coat reinforced with Sika Reemat Premium and sealed with a further coat of Sikalastic RoofPro

Layer Product Consumption
1. Primer Please refer to substrate pre-treatment Refer to primer data sheet
2. Base Coat Sikalastic RoofPro ≥ 1.0 l/m 2 (≥ 1.42 kg/m 2
3. Reinforcement Sika Reemat Premium -
4. Top Coat Sikalastic RoofPro ≥ 0.75 l/m 2 (≥ 1.06 kg/m 2 )

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 Information


Ambient Air Temperature

  • +5°C min. / +40°C max.

 

Relative Air Humidity

  • 5 % r.h. min. / 85 % r.h. max.

 

Substrate Temperature

  • +5°C min. / +60°C max.
  • ≥ 3°C above dew point

 

Substrate Moisture Content

  • ≤ 4 % pbw moisture content.
  • Test method: Sika -Tramex meter
  • No rising moisture according to ASTM (Polyethylene-sheet).

 

Substrate Pre-Treatment

Substrate Primer
Cementitious substrates Sika Concrete Primer or Sika Bonding Primer
Brick and Stone Not required
Ceramic tiles (unglazed), and concrete slabs Sika Concrete Primer or Sika Bonding Primer
Asphalt Not required, subject to surface as- sessment tests
Bituminous felt Not required, only fully reinforced systems
Single Ply Adhesion to single ply may vary ac- cording to type, age etc. Adhesion test required
Bituminous Coating Not required
Metals (Ferrous or galvanised metals, lead, copper, aluminium, brass or stainless steel) Sikalastic Metal Primer or Sika Primer 204n
Wooden substrates Timber based roof decks require a complete layer of Sikalastic Carrier. For small exposed timber sections, use Sika Concrete Primer or Sika Bonding Primer
Paints Subject to adhesion and compatibility tests
Existing Sika Liquid Plastics System Sika Reactivation Primer

For the consumption rates and waiting time / overcoating you should refer to the PDS of the appropriate cleaner and primer. Other substrates must be tested for their compatibility. If in doubt, apply a test area first.

 

Pot Life

Sikalastic RoofPro is designed for fast drying. High temperatures combined with high air humidity will increase the curing process. Thus, material in opened containers should be applied immediately. In opened containers, the material will form a film after 1 hour approx. (+20°C / 50 % r.h.)

 

Waiting Time / Overcoating

Ambient conditions Minimum waiting time*
5°C / 50 % r.h 18 hours
10°C / 50 % r.h 8 hours
20°C / 50 % r.h 6 hours
30°C / 50 % r.h 4 hours

*After four days the surface must be cleaned and primed with Sika Reactivation Primer before continuing.

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

 

Applied Product Ready for Use

Ambient conditions Rain resistant* Touch dry Full cure
5°C / 50 % r.h 10 minutes 10 hours 19 hours
10°C / 50 % r.h 10 minutes 6 hours 10 hours
20°C / 50 % r.h 10 minutes 4.5 hours 6 hours
30°C / 50 % r.h 10 minutes 2 hours 4 hours

*Be aware that impact of heavy rain or rain showers can physically damage the still liquid membrane.

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



Application Instructions


Substrate Conditions

The surface must be sound, of sufficient strength, clean, dry and free of dirt, oil, grease and other contamination. Depending on the material the substrate must be primed or mechanically cleaned. Grinding may be necessary to level the surface. Suitable substrates are such as: concrete, bituminous felts and coatings, metal, brickwork, asbestos cement, ceramic tiles, wooden substrates.

For detailed information regarding substrate preparation and primer chart please refer to Method Statement No. 850 915 09.

 

Mixing

Mixing is not required, however if the product is settled or separated on opening, stir Sikalastic RoofPro gently but thoroughly in order to achieve a uniform colour. Stirring gently will minimise air entrainment.

 

Application

Prior the application of Sikalastic RoofPro the priming coat if used must have cured tack-free. For the Waiting Time / Overcoating please refer to the PDS of the appropriate primer. Damageable areas (handrails, etc) have to be protected with tape or plastic wrapping.

Reinforced Roof Waterproofing:

Sikalastic RoofPro is applied in combination with Sika Reemat Premium.

  1. Apply first coat of approximately 1 l/m2 of Sikalastic RoofPro. Work only so far in advance that the material stays liquid.
  2. Roll in the Sikalastic Reemat Premium. Overlap it a minimum 5 cm and ensure overlaps are sufficiently wet to bond both layers.
  3. The roller may require only a little extra material to keep wet but no further significant material needs to be added at this stage.
  4. After the coat is dry enough to walk on, seal the roof area with second coat of Sikalastic RoofPro at a minimum 0.75 l/m2 per coat.

Please note, always begin with details prior starting with waterproofing the horizontal surface. For details follow step 1-4.

 

Cleaning of Equipment

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



Important Considerations


  • Do not apply Sikalastic RoofPro on substrates with rising moisture.
  • Sikalastic RoofPro is not suitable for permanent water immersion.
  • On substrates likely to exhibit out-gassing, apply during falling ambient and substrate temperature. If applied during rising temperatures “pin holing” may occur from rising air.
  • Do not dilute Sikalastic RoofPro with any solvent.
  • Do not use Sikalastic RoofPro for indoor applications.
  • Do not apply close to the air intake vent of a running air conditioning unit.
  • Do not apply Sikalastic RoofPro directly on Sika In- sulation boards. Instead use a Sika Carrier between Sika Insulation board and Sikalastic RoofPro.
  • Volatile bituminous materials may stain and or soften below the coating.
  • Areas with high movement, irregular substrates, or timber-based roof decks require a complete layer of Sikalastic Carrier.
  • Do not apply cementitious products (e.g. tile mortar) directly onto Sikalastic RoofPro.
  • Sikalastic RoofPro may exhibit slight chalking at the surface – do not use run off water for live fish tanks, etc.
  • Volatile bituminous materials may stain and or soften below the coating.
  • Low melting point bituminous materials may need priming – using a darker shade also helps hide any staining from the volatiles.



Product Details
4891-783221

Data sheet

Manufacturer
Sika
For Use By
Professional Use
Interior / Exterior Use
Exterior Use
Water / Solvent Based
Solvent
For Use On
Cement
Brick
Stone
Tiles
Asphalt
Bitumen
Ferrous
Galvanising
Lead
Copper
Aluminium
Brass
Stainless Steel
Application Method
Roller
Pack Size
15L
Colour(s)
Standard Colours
Suitable For Use On
Stone
Suitable For Use On
Tiles
Suitable For Use On
Aluminium
Suitable For Use On
Stainless Steel
Suitable For Use On
Asphalt
Suitable For Use On
Copper
Suitable For Use On
Ferrous Metals
Suitable For Use On
Cement
Suitable For Use On
Bituminous Surfaces
Suitable For Use On
Lead
Suitable For Use On
Brass
Suitable For Use On
Galvanising
Suitable For Use On
Brick
Application Method
Roller
Manufacturer
Sika
Components
1K
Usages
Flat Roof Construction
Product Usage Type
Liquid Applied Flat Roof Systems
Product Range
Sikalastic
Colour Family
Grey
Roof Type
Flat & Pitched
Attachments
Download


Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

Questions

Question about the product

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(read)
questions sikalastic roof pro on 2023-09-04 12:52:06
Question: 

can you use the above material on a sarnafil roof

Answer from Rawlins’ Technical Team:

This product can be used on a sarnail roof however an adhesive and compatibility test process will need to be carried out firstly.

We have replied to your enquiry seperately with more details.

IMPORTANT SHIPPING & DELIVERY INFORMATION

Sikalastic RoofPro is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.

Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.

Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.

All delivery costs below are excluding VAT