Davco K12 WPM Flexible Class 3 Waterproofing Membrane
Davco K12 WPM is a flexible, one-part, ready to use water-based Class 3 Waterproofing Membrane

FEATURES & BENEFITS of Davco K12 WPM
• Ready to use straight from the pail
• Suitable as an anti-fracture membrane
• Excellent curing time
• Water based polyurethane
• Non-toxic
• Available in blue

PACKAGING
Davco K12 WPM is available in a 17kg pail

WHERE TO USE
Surfaces
Davco K12 WPM Is suitable for use on most common substrates; concrete, cement renders, screed, lightweight blocks, prepared metal surfaces, building boards approved for wet areas, such as compressed fibre cement sheeting.
Areas
Davco K12 WPM is suitable for interior and exterior applications.
Commercial and domestic walls and floors including wet areas such as showers, bathrooms, terraces, balconies and other situations which can be tiled over, using Davco cement-based adhesives.
Davco K12 WPM is also suitable for confined areas, as Davco K12 WPM is water based and solvent free.

PRODUCT INFORMATION
AS 4858 Classification: AS/NZS 4858: Class III membrane
VOC Content: Low VOC – 1.98 g/L (SCAQMD method 304-91)
Coverage: Wet areas (2 coats required)
The minimum dry film thickness required is 0.6mm for walls and 0.8mm for floors. This should be achieved by applying 2 coats at a rate of 1.15L/m2 for walls and 1.50L/m2 for floors.
A 17KG pail of Davco K12 WPM will cover approximately 12m2 of walls or 9m2 of floors.
Balconies / patios – covered by hard floor covering (2 heavy coats required).
The minimum dry film thickness required is 0.8mm for floors. This should be achieved by applying 2 heavy coats at a rate of 1.50L/m2 for floors. A 17KG pail will cover approximately 9m2.
Curing Time
6-8 hours at 22°C after final coat

APPLICATION
Concrete Surfaces
• This can be primed with Ultraprime or PrimeX. Allow the primer to dry before application of the membrane
Timber Surfaces
• This applies to solid timber floors, ply and particle board flooring. Prime the surface with Ultraprime. Allow the primer to dry before application of the membrane
Compressed Fibre Cement
• This should be primed using PrimeX. Allow the primer to dry before application of the membrane. Refer to the PrimeX Data Sheet for instructions
Bond Breaker
• When using Abelrod gap filler as a bond breaker, prime the surface first as per instructions. Allow to dry
• Place Abelrod gap filler along all wall / floor and wall / wall junctions and secure into place with polyethylene / polypropylene tape
• When using K5 Bond Breaker, apply the bead into the corner and smooth out to form a 12mm cove in the corner and around any penetrations
• Allow to cure for 24 hours before subsequent application of membrane
General Application
• Davco K12 WPM requires no mixing. Apply directly from the pail. Use a thick brush or a short nap roller to apply the first coat of Davco K12 WPM 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.
Drain Application
• The drainage flange should ideally be recessed into the substrate and a bead of K5 Bond Breaker sealant placed around the circumference. The drainage flange should be lightly sanded before priming with plumbers primer
• Apply the first coat of Davco K12 WPM in and around the drain and allow to dry for approximately 1-2 hours at 20°C
• Apply a second coat in and around the drain ensuring no pinholes or air bubbles are present on the membrane surface. If necessary apply a third coat
Ponding
• If pond testing is required, ensure the membrane is allowed to cure for a minimum of 5 days before pond testing.
Clean-up & Return to Service
• Tools and excess Davco K12 WPM can be cleaned up with water while it is still wet.

PRECAUTIONS
Safety
• SDS is available from parexdavco.com.au
• It is recommended that applicators wear PVC or similar gloves and safety goggles while handling this product.
• Keep out of reach of children. If eye contact occurs, rinse with cool water
• If ingested, seek immediate medical assistance
General
• Do not apply in temperatures above 35ºC or below 5ºC
• Do not allow the product to freeze
• Delay external applications when inclement weather is imminent
• Do not thin the liquid, it is supplied ready for use
• Do not use Davco K12 WPM in areas of continuous water ponding or permanent water immersion like swimming pools, spas etc.
• Do not use where negative hydrostatic pressure is evident (i.e. rising damp), as it affects the bond of K12 WPM. Contact Parex for product recommendation in areas where negative hydrostatic pressure exists.
• Do not use Davco K12 WPM in commercial kitchen, hospital or other applications that will require frequent use of strong cleaning chemicals.
• Protect contents of pail from excessive heat, and freeze/thaw prior to use
Specific
• For other uses not mentioned in these instructions, please contact Parex