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Tile adhesives

Davco-POWDER MASTIC Tile Adhesive is a white, premium grade cement-based adhesive

By  Last updated: 18th May 2012


POWDER MASTIC Tile Adhesive is a white, premium
grade cement-based adhesive. It is polymer modified to
allow it to be used on a larger range of tiles and surfaces.
It is non-slump and has extended open time. It is
designed to resist shrinkage and has been specifically
formulated to provide superior coverage with smoother
and easier application.
POWDER MASTIC is classified C1S1TE when tested to
• Davco POWDER MASTIC is intended for use on
walls and floors in interior and exterior applications.
• Davco POWDER MASTIC can be used to fix tiles
onto concrete, cement renders, screeds, blockwork,
rendered brickwork, fibre cement sheet,
plasterboard and suitable waterproofing
• POWDER MASTIC can be used on correctly
installed compressed fibre cement sheet floor
systems that have been approved for tiling.
• POWDER MASTIC is suitable for tiling over timber
floors, provided that a fibre cement sheet tile
underlay is first installed.
• Davco POWDER MASTIC is recommended for the
fixing of all types of ceramic, mosaic, vitrified,
porcelain, terracotta, slate, quarry, granite and
marble tiles (with the exception of green marbles). It
well suited for use with light coloured stone.
• All surfaces must be structurally sound, dry, clean
and free from movement, oil, grease, wax, curing
compounds and any other loose or contaminating
• Painted surfaces must be scabbled/abraded to
expose at least 80% of the original substrate.
• Newly rendered/screeded surfaces must be allowed
to cure for at least 7 days and have a wood float
• All building boards must be firmly fixed according to
the manufacturer’s instructions and the relevant
Australian Standard(s)
• Old rendered/screeded surfaces must be thoroughly
cleaned prior to tiling and have a wood float finish.
• New concrete must be allowed to cure for 6 weeks
and should have a wood float finish.
• Steel trowel finished concrete must be acid etched
or mechanically abraded prior to tiling.
• Old concrete surfaces must be thoroughly cleaned
prior to tiling.
• Make sure all release agents are removed from
concrete surfaces, especially on tilt-up slabs.
• Porous/dusty surfaces (including fibre cement and
other building boards) must initially be primed using
Davco Ultraprime.
• Certain non-absorbent/contaminated surfaces can
easily be prepared for tiling via the use of Davco
Movement joints should be provided as follows:
1. Over movement joints in the background.
2. At a junction between different background
3. At fixtures interrupting the tile surface e.g. columns.
4. At internal vertical corners.
5. Around the perimeter of the tiling system.
6. At a maximum of 5 metre intervals in a grid pattern.
Note: Movement joints should go right through the tile
adhesive bed to the background and be kept free from
dirt and adhesive droppings. Movement joints must not
be less than 6mm nor greater than 10mm wide. All
movement joints that are 6mm wide can be filled with
Davco Sanitized® Colorcaulk. For wider applications use
Davco Davsil or polysulphide and polyurethane type
• The mixing ratio is 20kg of Davco POWDER
MASTIC to approximately 6 litres of clean water.
• Place the mixing water in the bucket and add Davco
POWDER MASTIC powder to the water, mixing until
it has a thick and creamy consistency.
• Allow to stand for 5 minutes and remix briefly before
• Always make sure it is fully mixed (no lumps) before
• Mix mechanically with a drill and paddle. Do not mix
by hand.
• Standard requirements:
Tile Trowel
Wall tiles up to 150mm x 150mm. 6mm
Wall/Floor tiles larger than
10mm or
Large tiles 400×400 or larger 12mm
Mosaic tiles 6mm
• Coat the back of tiles with lugs or grooves or larger
tiles with adhesive before placing. This is required
to ensure adequate adhesive coverage and a better

• Make sure the adhesive does not skin before
bedding the tile.
• If the surface is properly primed up to 2m2 of
adhesive may be spread at any one time.
• Press tiles firmly into position and make sure that all
the tiles are well bedded with no voids in the
• Occasionally lift a tile after placing to check that the
coverage is adequate.
• After laying do not disturb or allow traffic on the tiles
for at least 24 hours (at 20oC).
• Grouting can be carried out 24 hours after the tiling.
• Suitable Grouts
Joint Width Grout
1 – 6 mm Sanitized® Colorgrout
6 – 12 mm Slate & Quarry Grout
1 -3 mm Sanitized® Porcelain Grout
• Refer to the Davco Adhesive and Grout Selection
Guide for further information.
• Davco Grout Additive may be used to increase grout
flexibility and water resistance. It should always be
used when grouting over fibre cement sheeted
floors to reduce cracking or powdering.
• Wait 24 hours after grouting before putting the area
into service.
• Do not apply Davco POWDER MASTIC in
temperatures above 400C or below 50C.
• Back buttering to achieve 100% coverage is
recommended for light coloured or translucent
tiles/stone to help ensure colour consistency.
• Do not allow the adhesive to skin prior to laying the
tiles. If the adhesive skins, remove and dispose of
it, then re-apply fresh adhesive.
• For other uses or the use of Davco POWDER
MASTIC in situations not mentioned in these
instructions, contact your ParexDavco (Australia)
Pty Ltd state office.
• Being cement based, Davco POWDER MASTIC is
alkali in nature, which can cause dermatitis. It is
recommended that applicators wear PVC or similar
gloves and safety goggles.
• For a full MSDS on this product, contact your
ParexDavco (Australia) Pty Ltd state office.
A 20kg bag of POWDER MASTIC Covers
10m2 using a 6mm x 6mm-notched trowel.
7m2 using a 10mm x 10mm-notched trowel.
5m2 using a 12mm x 12mm-notched trowel.
• Avoid letting excessive adhesive dry as it easiest to
remove when it is fresh.
• Remove wet product with a damp cloth.
• Clean tools and equipment with water.
• If allowed to dry it will need to be removed
mechanically or using a suitable acid based product.
In some cases these methods can affect the tile and
should be avoided whenever possible.
20kg bags.
Up to 12 Months when stored unopened in elevated, cool
and dry conditions.
Appearance: White Powder
Bulk Density: ~1.5 kg/L
Open Time at 200C (primed surface): 30 minutes
Adjustment Time at 20oC: ~25 minutes
Pot Life at 20oC: >2 Hours
Curing Time at 200C: 24 hours
The use of this product is beyond the manufacturer’s control, and
liability is restricted to the replacement of material proven faulty. The
manufacturer is not responsible for any loss or damage arising from
incorrect usage. All workmanship must be carried out in accordance
with AS 3958.1 – 2007.
The information contained herein is to the best of our knowledge true
and accurate. No warranty is implied or given as to its completeness or
accuracy in describing the performance or suitability of the product for a
particular application. Users are asked to check that the literature in
their possession is the latest issue.


Toll Free Technical Advice
1800 653 347
67 Elizabeth Street
Wetherill Park NSW 2164
Tel:  (02) 9616 3000
Fax:  (02) 9725 5551    QUEENSLAND
6 Mackie Way
Brendale QLD 4500
Tel:  (07) 3205 5677
Fax:  (07) 3205 3443
PO Box 4426 Dandenong Sth Business Centre
Dandenong VIC 3175
Tel:  (03) 8791 8300
Fax:  (03) 8791 8399     WESTERN AUSTRALIA
65 Challenge Boulevarde
Enterprise Park Wangara WA 6065
Tel:  (08) 9302 1466
Fax:  (08) 9302 1174
Unit C
Day Avenue
Ashford SA 5035
Tel:  (08) 8371 3511
Fax:  (08) 8371 3577

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