Sikalastic 487 - High Performance Polyurethane Waterproofing Membrane
Moisture-Curing, Elastomeric PU Membrane for Under-Screed Applications
Sikalastic-487 is a high-performance, hand-applied, low VOC, moisture-curing single component elastomeric polyurethane membrane designed for various waterproofing applications.
Uses:
Sikalastic-487 is ideal for under-screed waterproofing in:
- Wet areas (e.g., bathrooms, kitchens)
- Balconies
- Non-UV exposed applications
- Podiums and decks
Characteristics / Advantages:
- Low VOC, complies with Green Star requirements
- Quick tack-free surface
- High resistance to stagnant water
- High resistance to puncture
- Excellent crack bridging capability
- High elongation, Class III membrane (>300% according to AS/NZ4858)
- Single component, ready to use
Product Information:
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Composition: Single-pack moisture curing polyurethane
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Packaging: 15 Litres
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Shelf life: 9 months from date of production
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Storage conditions: Dry conditions, +5 °C to +30 °C, in original, unopened packaging
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Colour: Grey
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Density: 1.35-1.40 g/cm³
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Viscosity: 8,000 - 14,000 cP @30RPM
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Volatile organic compound (VOC) content: 180g/L
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Shore A hardness: 50 Shore A
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Tensile strength: > 2 MPa
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Tensile strain at break: > 300%
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Tear strength: 12 kN/m
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Service temperature: -20 to +80°C
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Dry film thickness: 1.2mm (achieved with 2 coats of minimum 680 microns WFT)
Application Information:
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Relative air humidity: Between 20 and 90%
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Substrate temperature: +5 to +35°C
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Substrate moisture content: Up to 5%
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Waiting time to overcoating: Typically overnight to within 2 days. If exceeded, light abrasion and reactivation with Sika Thinner C or removal and re-application is needed.
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Drying time: 24 hours for full cure
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Consumption Rate (indicative):
- Sikalastic PU Primer: 4m² per Litre
- Sikalastic Moisture Seal: Up to 10m² per Litre (refer to PDS)
- Sikalastic-487 (10% diluted Thinner C - as primer): 4m² per Litre
Important Considerations:
- Do not install Sikalastic-487 without the use of a primer.
- Do not under apply Sikalastic-487.
Application Instructions:
Substrate Preparation: Surface must be clean, sound, smooth, dust-free, and oil-free. A diluted layer of Sikalastic-487 (10% Thinner C) can prime dry, contaminant-free concrete. For high porosity, an epoxy primer is recommended (see 'Priming' section in full PDS).
Priming: Use Sikalastic PU Primer, Sikalastic Moisture Seal, or diluted Sikalastic-487 as per substrate requirements and PDS instructions.
Membrane Application: Apply Sikalastic-487 with a brush or roller to achieve a minimum of 1.2mm dry film thickness (2 coats of 680 microns WFT). Light foot traffic and screed application are possible after 24 hours.
Cleaning of Equipment: Clean reusable tools with Sika Thinner C before curing.
Get unbeatable trade prices and fast nationwide shipping on all Sika products. Pick up your order from our store, Sika Wetherill Park in Sydney, or any Sika warehouse nationwide.
Download Sikalastic 487 waterproofing membrane datasheets.
Sikalastic 487 product Datasheet
Sikalastic 487 Safety Datasheet
Colour Accuracy Disclaimer: We have taken care to display the most accurate visuals of our products. However, we are not responsible for the colour accuracy of the device you are viewing our swatches on. These variations arise due to different computer monitors and devices (make, model and technology, as well as resolution, contrast and brightness control settings) in much the same way a scan will differ from an original image and a colour photocopy. Furthermore, coatings can exhibit variation in perceived colour depending on gloss level and application method. If you require a very specific colour match, please make your selection via actual swatches and colour boards available at our showroom.
Product Disclaimer: Ensure you read all product, technical and safety data sheets prior to application as liability falls on the applicator. All products must be applied in accordance with manufacturer’s recommended method.
