Davco K10 Plus

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 Surfaces

• All metal surfaces must be free from rust
• Prime metal surface Sika Prep n Prime

Bond Breaker

Suitable bond breaker sealant: Any Sika neutral cure silicone sealant

Refer to product datasheet for additional information.

Connector Sealants

Suitable connector sealant: Sikaflex Fillet or Sikaflex Construction AP

Refer to product datasheet for additional information

Crack / Joints – subject to movement

• 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.

CLEANING OF TOOLS

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

Davco K10 Plus Sika Data Sheets