Stamped Pattern Concrete
Application Guide (PDF 196kb)
This guide is intended to provide basic instructions for the application
of Stamp Impression Decorative Concrete, a surface-formed method used on
freshly placed concrete to simulate brick, stone, slate or tile paving in
pathways and light-traffic driveways.
Stamp impression concrete systems originated from the United States of America
and, developed as an economical alternative to installation and placement
of segmental tile, slate or brick pavers. The pavement on which stamp impression
concrete systems are used must be designed for the loadings and soil conditions
that support it. Reference to Standards Australia, AS 3727 – 1993,
Guide to Residential Pavements is recommended for the selection and construction
of pavements associated with residential buildings consisting of single houses
or multiple dwellings in medium density housing development. It does not
apply to the design and construction of public roads or streets where stamp
impression concrete systems may not be applied.
Stamp impression concrete systems should only be selected on the basis of
providing an acceptable probability of serviceability during the design life
of the pavement. The systems would normally be applied by experience concrete
placers and, rely on proper and workmanlike installation and finishing practices
for decorative effect and, serviceability.
Stamp impression concrete systems basically require a five (5) stage process
to complete the work. First, a dry-shake color hardener (base coat) is cast
twice over the fresh concrete surface and, completely and thoroughly trowelled
after each cast. The base coat colour is the dominant colour seen in the
The next step requires a release agent powder (sometimes in liquid form)
to be cast over the freshly trowelled base coat colour to prevent suction
(sticking) of the stamp-mats used to produce the pattern design in the concrete
surface. Release agent material would normally be pre-mixed with a colour
pigment to produce a highlight or contrasting colour tone in the simulated
slate, tile or brick impressions in the finished pavement.
The third step
is applying the stamp matrix to achieve the paving pattern design in the
concrete surface. Step four requires removal of the release agent powder
from the surface when the concrete has achieved hard-set and, cured for
an initial period of not less than 72 hours after completion of the work.
The release agent powder must be removed to the point where only pigments
of its pre-mixed colour remain in the impressions in the finished pavement.
Finally, a clear sealing compound is applied (two coats) to promote cleanability
and, limited protection against most accidental spillages.
3. Basic Application and Finishing Instructions.
3.1 Concrete Consistency.
Concrete shall be of such consistency that it can be readily placed and
compacted in the forms without segregation of materials and without excess
bleed water collecting on the surface. Concrete slump shall be greater than
85mm and should not exceed 110mm unless a high range water reducing admixture
is approved. Concrete grade of 25MPa is recommended.
3.2 Initial Concrete Finish.
Fresh concrete shall be compacted and worked until all the coarse aggregate
is below the surface and the mortar comes to the top. It shall then be struck
off and initially finished with at least a metal float to produce an even,
3.3 Application of Base Coat Colour.
Use CMM 3000 Multi Mix grade colour hardener. Cast colour hardener twice
- two separate casting operations evenly and uniformly over the entire concrete
surface. Wide areas may require the use of a bridge to ensure consistent
coverage. Cast at least two thirds of the total volume of colour hardener
first; then completely and thoroughly trowel into the concrete surface. Repeat
this operation with the remaining one third of the total volume of colour
hardener. Final finish must achieve surface texture to promote skid resistance
and may require use of a coving trowel or similar .
Colour Hardener Application Rate: 2kg to 2.5kg x m2 equivalent to 8m2 to
10m2 x 20kg bag of CMM Multi Mix grade colour hardener product.
3.4 Application of Release Agent Powder.
Use RA 3000 Release
Agent powder. Cast release agent powder once – evenly
and uniformly over the entire concrete surface. DO NOT trowel into the surface.
Note: Release agent powder is similar to talc powder in weight and, softness
Special precautions must be taken on days of medium to high wind velocity
to prevent air-borne spread of the product to adjacent areas. The use of
windbreaks around the perimeter of the work in these conditions is recommended.
Release Agent Application Rate: 6m2 x 1kg.
3.5 Application of Stamp Impression Mats.
concrete stamping mats are produced in a range of paving impressions that
simulate the appearance of slate, tile, stone or brick and, are packaged
in sets that normally comprise of five hard mats, and one ‘floppy’ mat
used to complete a run that abuts a fixed structure or pavement edge.
mat placement for consistent pattern match and decorative uniformity within
the dimensions of any given pavement requires competency on the part of
the concrete contractor. It is critical that contractors are familiar with
the geometry of stamp mats and, how they interface with each other so as
to plan and complete the work in a professional manner.
The stamping process should commence as soon as possible before hard-set
occurs, but not so early as to cause unacceptable raveling or scuffing of
the concrete surface.
For large areas, the use of surface hard retardants may extend critical time
to complete the work in a proper and uniform manner.
Each mat is placed separately with the pattern side on the concrete surface,
interlocking with each other until the full set of mats combine together
to form a matrix.
Downward, even pressure must be applied over the stamp mat
matrix to form the impression of the paving design in the concrete surface.
This is normally achieved by walking on the mats, relying on body weight
to induce the stamp impression or, by lightly tamping the mats with a purpose-made
This process is repeated time after time while standing on mats already
in position until the entire paving area has been stamped.
3.6 Removal of the Release Agent Powder.
Release agent powder must not be removed from the surface before the critical
72-hour concrete curing period has elapsed. Lightly sweeping and collection
of excess release agent powder from the surface is permissible only when
the concrete has achieved hard-set. Freshly finished surfaces must be protected
from rain or damage from other sources.
When the critical 72-hour concrete curing period has elapsed, use DCC Decorative
Driveway Cleaner, as directed on instruction label, to scrub and remove the
release agent powder from the surface. When completed, the colour pigment
from the release agent powder must only be apparent in the stamp impressions
on the pavement surface.
If this pigment colour is clearly noticeable over
the entire surface, wash the surface with a mild hydrochloric acid solution.
Minimum dilution rate: 1 part acid : 25 parts clean water.
(200ml acid : 5lts clean water).
Important Precautions – Acid Washing Pavement Surfaces.
The pavement surface must be saturated with water before application of
diluted acid solution. Diluted acid solution must always be placed on wet
concrete surfaces – never put acid solutions on dry surfaces.
diluted acid solution ( use a standard acid-resistant plastic watering
can to dispense acid solution) onto the wet concrete surface and lightly
broom over the applied area – then immediately flood with clean water
to completely remove the acid solution.
Repeat this process until the entire pavement surface has been washed with
the diluted acid solution.
Allow pavement service to dry for at least 24 hours in summertime, longer
3.7 Application of Clear Sealing Compound.
Two coats of clear sealer should be applied to the surface to complete the
work and, to promote cleanability and, maintenance of the RA pigments that
form the highlight- colour tones in the stamp impressions in the finished
Use Designer Concrete Coatings ‘Prime & Seal’ for the first
Use Designer Concrete Coatings ‘Decorative Concrete Sealer’ for
the second coat and apply not less than 3 days after application of the first
DO NOT walk on sealed surfaces for 24 hours after application and, DO NOT
park motor vehicles on sealed surfaces for 72 hours after application.
Best method of application: use a lambs-wool paint roller for the first
coat – and a soft polypropylene bristle or natural bristle broom for
the second coat. Apply evenly and uniformly over the surface.
Application Rate: 4m2/litre
4. Precautions and Limitations of Stamp Impression Concrete Systems.
Before Application - Protect Adjacent Exposed Structures:
Colour hardener and release agent products are manufactured in powder form
and, when applied, particles may or will be carried in the surrounding atmosphere
by prevailing wind. Protect adjacent exposed surfaces of all structures with
plastic film sheeting or equivalent to prevent stain damage.
Pavement Grade Limitations:
Stamp Impression Concrete Systems typically simulate the smooth-surface
properties of slate and cobble-type stone paving that normally have lower
slip resistance to other paving materials that have a textured surface in
the finished product.
Application of stamp impression concrete systems on moderate to steep grades
is not recommended.
Limitations of Clear Acrylic Sealing Compounds:
Clear sealing compounds are applied to the finished work to promote cleanability
of the surface and, to a lesser degree, to seal the pigmented colours that
remain on the surface from the release agent powder to promote a highlight-colour
Permanent colour enhancement and unlimited protection against staining and/or
petrochemical residues are not the intended purpose nor is the product designed
to satisfy this performance expectation.
Clear acrylic sealing compounds must not be applied to damp or wet surfaces
nor can they be applied in ambient temperatures below 10 degrees Celsius
or above 28 degrees Celsius. Product failure may or will result from improper
application, or use contrary to the manufacturer’s advice and instructions
issued on labels attached to pails and drums.
Materials Safe Handling Information:
DCC Manufacturing has Materials Safety Data Sheets for all products produced
and/or marketed by Designer Concrete Coatings Pty Ltd in compliance with
Work Cover requirements.
All information is supplied with product purchases for reference and, recommended
safe handling procedures by end users.
Normal Maintenance Requirements:
Pavement owners are required to affect a reasonable standard of maintenance
of the finished pavement surface to ensure an acceptable probability of serviceability
and durability of the work. Principles of maintenance include routine pressure
cleaning and regular removal of oil spillages from motor vehicles and, general
sweeping of leaves and other staining agents such as dirt and grime from
For advice about maintenance requirements of a residential pavement that
are the responsibility of pavement owners, refer to Clause 4.3 of AS 3727 – 1993
Standards Australia Guide to Residential Pavements.
The information contained in this publication is for general guidance only
and in no way replaces the advice or services of professional consultants.
No liability is accepted by the Publisher for its use.
Licensed or otherwise appropriately experienced concrete contractors who
use and/or recommend Designer Concrete Coatings product systems are independent
entities and bears responsibility for workmanship and proper application
of Designer Concrete Coatings Pty Ltd product systems and asserts that the
contractor is fully conversant in the proper application of decorative surface-formed
concrete product systems and has received copies of the manufacturer’s
product systems specifications.
DCC Manufacturing Pty Ltd nor any of its subsidiaries assumes any liability
expressed or implied for the workmanship or improper product application
of independent concrete contractors or their agents or employees, nor for
product abuse or damage caused by undue influence or by pavement owners.
Provisions of this Disclosure do not reduce or limit DCC Manufacturing Pty
Ltd obligations in relation to proven defective or faulty materials at the
point of sale should they ever arise from time to time as stipulated in the
company’s written product warranty.
TOP | BACK |