ALKA 311
VOC-Free, Quick-Curing Two-Component Elastomeric PU Waterproofing MembraneFoot Trafficable Membrane
Alka 311 is a high-performance, hand-applied, VOC-free, quick-curing two-pack elastomeric polyurethane waterproofing membrane.
Alka 311 is directly foot-trafficable.
15L drum for $000 including GST.
Usage
Alka 311 is a multipurpose elastomeric waterproofing membrane that can be used in:
- Showers, Bathrooms,
- Under Tiles,
- Balconies, terraces,
- Planter Boxes,
- Roofings,
- Flower Beds,
- Kitchens,
- Pools.
Advantages
- Polyurethane modified for fast-re coating and easy film build,
- Permanent flexibility with high elongation.
- Suitable for use in conjunction with all cement-based tile adhesives that conform to AS2358.
- Dries to a keyed finish to promote direct tile adhesion
- Seamless application for leak-free performance.
Packaging
15 Litres / 18 Kg drums
Colour
– Grey
Shelf life: 9 months
Storage conditions
Store away from direct sunlight and away from naked flames, sparks, and heating.
Flash point >25 C
Density: 1.05-1.10 Kg/L
Curing time
3-5 hours, depending on the temperature
Waiting time for overcoating
Maximum 24 hours after application
Consumption
2 coats of a minimum of 1000 g/m2 each are required to achieve a 0.5-3 mm dry film thickness (DFT).
Coats – 2 to 3 normally
APPLICATION INSTRUCTIONS
Alka 311 is supplied in ready-to-use pails.
Preparation:
Surface must be clean, sound, smooth and dust-free as well as oil-free.
A compatible primer. Epoxy should be applied to ensure membrane adhesion to the substrate and to prevent outgassing from the concrete.
In the case of high porosity, wet concrete (humidity >5%) or in any doubt, it is recommended to use a hydro-epoxy primer. Compatibility of the primer with the membrane must be checked prior to application.
Alka 311 can be applied with a brush or a roller to the desired thickness.
2 coats of 0.8 L/m2 (1.04 kg/m2) are required to achieve a dry film thickness (DFT) of 1.2 mm. For UV resistance, coating thickness must abide by the numbers given on this Technical Datasheet. A thinner coating will result in premature degradation. Application temperature of Alka 311 is >5°C to 35°C.
Alka 311 can be subject to light foot traffic after 24 hours.
Vehicle traffic is not permitted on Alka 311 without the application of a top coat. Where extended UV resistance is required, it is recommended that Alka 311 be coated with an Alka topcoat system such as Alka 210 Polyaspartic. Check with your ALKA Representative for compatibility before application.
Recoating instructions:
In normal conditions, Alka 311 can be recoated with another layer of Alka 311 after one night and within 2 days. In case of rain or if the recoating interval was exceeded, come back to the substrate by grinding.
Contact your Alka Coatings representative with any questions.
1-2 layers of glass fibre cloth or other carcass materials can be added in the middle of the coating. Generally, 1.5-2.0 kg/m² for a 1 mm thick rubber-like membrane to form.
Clean-up
Reusable tools should be cleaned carefully with Xylene or MEK before curing.
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