Davco K10 Plus Waterproofing Membrane - Sika Waterproofing

Davco K10 Plus - Flexible Class III Waterproofing Membrane

Davco K10 Plus is a premium performance, flexible, premixed, water-based polyurethane Class III waterproofing membrane. Designed for use under tiles, stone, and other resilient finishes in both interior and exterior commercial and domestic applications. Ideal for wet areas like showers and balconies. Available in Green or Grey from ProTrade Warehouse across Australia.

Uses

Ideal for waterproofing a wide range of areas in both commercial and residential settings, including critical wet zones like showers, bathrooms, terraces, and balconies. Also suitable for roofs and walkways before tiling with a Sika polymer-modified cement-based adhesive. Its water-based, solvent-free formula makes it perfect for confined spaces.

Characteristics / Advantages

• Premixed and ready to use straight from the pail.
• Suitable as an anti-fracture membrane.
• Excellent cure time for efficient project completion.
• Water-based polyurethane formulation.
• Class III, highly flexible with >500% elongation.
• Non-toxic for safer application.
• Available in Green (4L & 20L) and Grey (20L).

Product Information

Packaging: 4L or 20L Pail (Green), 20L pail (Grey)

Shelf life: 12 months from the date of manufacture.

Storage conditions: Store in dry, cool conditions away from direct sunlight. Protect from freezing.

Volatile organic compound (VOC) content: 40g/L 

Application Information

Consumption: Minimum dry film thickness of 1.0mm achieved with 2 coats at 1.45L/m². A 20L pail covers approximately 13.8m² with 2 coats or 22m² with 1 coat (0.75mm wet film thickness per coat).

Drying Time (at 22°C and 50% RH): Allow 1-2 hours drying between coats and 6-8 hours before tiling or applying other finishes. Note: Drying times vary with site conditions.

Important Considerations

• Test in an inconspicuous area first.
• Do not apply above 35°C or below 5°C.
• Protect from freezing.
• Delay external applications if inclement weather is imminent.
• Do not thin; the product is ready to use.
• Not for permanent immersion (swimming pools, ponds).
• Do not use where negative hydrostatic pressure (rising damp) is evident. Contact Sika technical for advice.
• Substrates must be rigid and comply with deflection standards for the intended finish.
• Davco K10 Plus is not designed for exposed use and must be covered.
• Consult Sika Australia for uses not mentioned.

Application Instructions

SUBSTRATE QUALITY

General

• All surfaces must be installed according to manufacturer's instructions and relevant Australian Standards and be structurally sound, dry, clean and free from movement, oil, grease, wax, curing compounds, release agents, efflorescence or any other loose or contaminating material.
• Prior to application, remove all sharp protrusions, which may pierce the membrane
• Avoid voids, potholes and divots in the substrate must be appropriately prepared with a Sika branded patching mortar.

Concrete

• All new concrete slabs must have a wood float finish and be allowed to cure for 6 weeks.
• Old concrete must be cleaned with a strong commercial grade detergent or degreaser. Residue must be thoroughly washed off with clean water. Allow the surface to dry for at least 24 hours.
• If the concrete has a steel trowel or power float finish, it must be mechanically prepared to expose the aggregate. Signs of Laitance and Efflorescence must be removed.

Cement Render & Screeds

• Rendered or screeds must have a wood float finish and be allowed to cure for 7 days.

Light Weight Blocks

• Prime the surface with 2 coats of Davco Ultraprime or Davco PrimeX

Metal drains and waterstop angles

• All metal surfaces must be free from rust
• Lightly abrade/ sand the substrate prior to application of the Davco K10 Plus

PVC Control leak flanges

• Control leak flanges shall be recessed to avoid water pooling
• Lightly sand control leak flanges prior to waterproofing application

Bond Breaker

• Any suitable Sika neutral cure silicone sealant

Connector Sealants

• Any suitable Sikaflex PU sealant

Cracks - subject to movement (non structural)

• All cracks / joints, irrespective of their width, must be filled with a Sika branded Neutral cure silicone sealant. Then a 50mm wide polyethylene / polypropylene tape should be placed over the crack, ensuring it adheres to the surface.

Building Boards and Sheeting

• Standard wall / floor building boards must be primed with a suitable Sika Branded primer and firmly fixed in accordance to manufacturer instructions and applicable Australian Standards. Such boards / sheeting include plasterboard, fibre cement sheeting, marine grade ply and wet area composition board. Check with the board / sheeting manufacturer for their suitability.
• Screw or nail heads must be treated with a Sika branded epoxy or a Sika connector sealant
• All sheeting joints need to be covered with a 50mm wide Polyethylene / Polypropylene tape.

Falls to Drains

• In all wet areas, it is important that falls be provided to the drain outlet. The slope of this fall should be 1:80 - which equates to 12.5mm fall over 1m. For wet areas, balconies, and rooftops, if the existing substrate does not provide the required falls, a sand/cement screed will be need to be created. Once the falls are in place and screeds have cured, apply the Davco K10 Plus as per instructions. Contact Sika Australia for more information on screed mix should this be required.
• For balconies and rooftops, the slope of this fall should be 1:100 – which equates to a 10mm fall over 1m. If the existing substrate does not provide the necessary fall, a sand / cement screed needs to be created. Once the screed is in place and has cured adequately, apply the membrane as per instructions below. Contact Sika Australia for more information on an appropriate screed mix should this be required.

SUBSTRATE PREPARATION

Substrate Priming

• All substrates shall require priming prior to the application of Davco K10 Plus.

• Refer to primer product datasheet for additional information.

APPLICATION

• Use a thick brush or a short nap roller to apply the first coat of Davco K10 Plus on the area to be waterproofed
• Allow the first coat to dry for approximately 1-2 hours before applying the 2nd coat at 90° to the first coat. Ensure there are no pinholes or air bubbles on the membrane surface
• Apply a third coat only if necessary or required to do so
• Allow the final coat to dry for at least 6 hours before tiling (according to temperature conditions). This gives an overall drying time of 6-8 hours for the full application.

Note: The lower the temperature, the slower the drying time of the membrane

CLEANING OF TOOLS

• Tools and excess K10 Plus can be cleaned up with water while it is still wet

Get Davco K10 Plus flexible waterproofing membrane from ProTrade Warehouse. Collect from any Sika warehouse or our Silverwater store. Delivery available Australia wide.

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.