Sikalastic 488 SL - Moisture-Curing Waterproofing Membrane
High-Performance Elastomeric Polyurethane for Diverse Waterproofing Needs
Sikalastic-488 (au) is a high-performance, hand-applied, low VOC, moisture-curing single-pack elastomeric polyurethane waterproofing membrane. Notably, Sikalastic-488 is directly foot-trafficable and serves as the base coat membrane within the SikaRoof MTC-UV systems.
Key Characteristics and Advantages:
- Seamless membrane
- High resistance to puncture and standing water
- Quick tack-free surface
- Low VOC
- High elongation
- Class III membrane
- Crack bridging capability, no reinforcement needed
- Elastomeric behaviour
- Single pack, ready to use
Typical Uses:
Designed for diverse waterproofing applications including:
- Balconies
- Terraces
- Podium decks
- Plant room floors
- Inverted roofs
- Under tile beds
- Under paver-pad systems
Approvals / Certificates:
AS / NZS 4654.1:2012 Waterproofing membranes for external above-ground (CSIRO approved)
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
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Colour: Light Grey
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Density: 1.30-1.35 (g/cm³)
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Viscosity: 10,000-18000cP @30 RPM
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Volatile organic compound (VOC) content: 250g/L
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Shore A hardness: 70 Shore A
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Tensile strength: 6 MPa
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Tensile strain at break: 300%
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Tear strength: 20 kg/cm
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Service temperature: -20 to +80 °C
Coverage:
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SikaRoof MTC-12 UV (1.2mm DFT system): 10m² per 15L pail (2x coats of 750 micron wet film thickness required)
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SikaRoof MTC-14 UV (1.4mm DFT system): 8.6m² per 15L pail (2x coats of 870 micron wet film thickness required)
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SikaRoof MTC-20 UV (2.0mm DFT system): 6m² per 15L pail (3x coats of 830 micron wet film thickness required)
Application Instructions:
Substrate Preparation: Surface must be clean, sound, smooth and dust-free as well as oil-free. Please refer to the 'SikaRoof MTC-UV systems' method statement for further information.
Mixing: Ready-to-use pails. Mix until homogenous.
Application:
- Sikalastic-488 can be applied with a brush or a roller to the desired thickness.
- Apply Sikalastic-488 (au) at the recommended coverage rates for the specific SikaRoof MTC-UV system that is being installed. The dry film thickness for each coat is mentioned in the coverage section.
- Allow Sikalastic-488 (au) to cure for a minimum 16 hours or until tack free before applying the following layer.
- Do not allow more than 48 hours between coats of Sikalastic-488 (au) otherwise abrasion and reactivation will be required before proceeding.
- Sikalastic-488 can be subject to foot traffic after 24 hours.
Cleaning of Equipment: Reusable tools should be cleaned carefully with Sika Thinner C before curing.
Important Considerations:
- Do not install Sikalastic-488 (au) without the use of a primer.
- Do not apply Sikalastic-488 (au) when rain is imminent within 8-12 hour period of application.
- Always check dew point before application of Sikalastic-488 (au).
- Do not dilute/thin Sikalastic-488 (au) with solvents.
- To avoid outgassing and pinholing, apply Sikalastic-488 (au) on a declining temperature or out of direct sunlight where possible. Adhere to the substrate temperatures on the PDS.
- If surface is porous, double priming may be required to effectively seal the substrate before application of Sikalastic-488 (au).
- Do not under apply Sikalastic-488 (au) as this will impact product performance and may cause premature degradation. Please refer to the SikaRoof MTC-UV system data sheets for the build-up of each individual system.
- Vehicle traffic is not permitted on Sikalastic-488.
- Sikalastic-488 (au) when exposed to UV light will discolour and chalking of the surface may occur which could effect the products performance long term. It is highly recommended that a top coat be applied. Please refer to the SikaRoof MTC-UV system data sheets.
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.
