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

Quick Links - Click To Jump To Section:

• Features & Benefits
• Approvals & Certificates
• Product Information
• Systems
• Application Information
• Application Instructions
• Important Considerations

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

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

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

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

*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

*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.