Sandmar - Application guide

Sandmar Products Australia Pty Ltd

8/26 Longstaff Rd
Bayswater, VIC. 3153

Phone: (03) 9738-0770
Fax: (03) 9738-0996

sales@sandmar.com.au

 

Application Guide

Aquepoxy® - Application Guidelines

Surface preparation  

Aquepoxy® will adhere well to most concrete surfaces with compressive strength up to 35mpa. On concrete surfaces above 35mpa, previously sealed/painted surfaces or where a curing membrane has been used to increase surface hardness, adhesion must always be tested on a small area (samples provided on request) prior to commencing application on a commercial scale.
 
aquepoxy environmentally safe concrete floor sealer
 
The concrete surface should be sound and free of dirt, dust, oil and grease. The floor should be vacuumed to remove debris from saw cuts and expansion joints etc. 
Aquepoxy® can be applied over deeply penetrated oil and grease stains as long as surface oil and grease have been removed completely.
A high pressure wash with sugar soap solution followed by a rinse with clean water is highly recommended. 
 
Aquepoxy® can be applied to a slightly damp surface (recently washed) but not when saturated i.e. Mop up ponded water before application.
 
 
Acid etching is not usually necessary, nor recommended, as this may affect the curing of the Aquepoxy® if the acid is not neutralized properly.  Also, variations in surface sheen can occur due to uneven acid etching.  
Exception: for high compessive strength concrete - see above and notes in our "Surface Preparation" webpage.
 
Caution: If a previous coating is flaking or peeling, this must be removed completely before application of Aquepoxy® sealer.
 
See our "Surface Preparation" webpage for more detail on substrate preparation.
 
Mixing ratio
Aquepoxy® parts “A” and “B” should be mixed in the following ratio:

            Part “A” (coloured component) . . . . .    3 parts by volume
            Part “B” (latex component)   . . . . . . .    2 parts by volume.
 
A spiral mixer head fitted to a variable speed electric drill gives good results. Mix thoroughly with a power mixer for a minimum of 5 minutes then allow to stand for a further 5 minutes before application. Skidbrake Fine additive can be added slowly when mixing parts “A” and “B”
 
When mixing a new batch, material remaining in the roller tray from the previous mix should be mixed in with the new mix. This is a good time to rinse the roller and tray to avoid Aquepoxy® setting and creating application and cleaning problems later.

Recommended coverage rate

Two coat application is generally recommended for industrial surfaces such as factory and warehouse floors. To achieve the recommended total dry film thickness of 100 to 120 microns on a relatively porous concrete floor, the first coat of Aquepoxy® should be applied at 8-10mt2/lt and second coat at 10-12mt2/lt.
 
Caution: Do not try to achieve required film thickness in a single coat as poor curing / inferior appearance may result due to water entrapment in the cured finish.
 
 

Curing characteristics

Recoat time - usually 4 to 6 hours or as soon as floor can be walked on.
  • Hard dry:   12 hours                        Foot traffic:        24 hours
  • Full cure:   3-7 days                        Vehicle traffic:    72 hours
The finished surface can usually accommodate some light vehicle traffic after 48 hours but under no circumstances should a vehicle be allowed to stand on the coated surface (i.e. overnight) within 72 hours of application.
 
Caution:
Ambient and concrete surface temperature must be above 10oC during application and curing of Aquepoxy®. If below this temperature whilst drying, dry time will increase and cure will be suppressed until the temperature rises above 10oC. Curing will slow down as the temperature drops to 10oC.
 
 

Application methods

  • Roller Application:
    Use 20mm nap Viking or similar lambs wool roller and tray with open wire grill insert. Apply a generous coat of sealer to achieve specified coating thickness. Use criss-cross roller action and avoid rolling back and forth in one direction as this will create a tram line effect.
    Empty tray completely before refilling. This will ensure old mix does not accumulate in the tray and set before being applied.

  • Spray Application:
    Use airless spray with minimum 17µm nozzle tip. Flush equipment regularly with water.
    Caution: Care must be taken to ensure that the specified film build and even coverage achieved.

IMPORTANT NOTE:  Ensure adequate air flow during application and drying of Aquepoxy®

It is important to ensure that adequate air flow is present across the surface of the floor for at least two hours after application of Aquepoxy® coatings. An industrial fan, air conditioning and/or open roller door will assist drying. With no air movement, a layer of water vapour can form on the surface during curing and can result in variation in sheen and poor cleanability as water will not completely evaporate from the sealer before full cure. When working in confined areas (closed offices, toilet blocks stairwells etc.) a small domestic fan will usually provide adequate air movement in most situations.

 

High Traffic Areas

High traffic areas, e.g. turning circles ahead of ramps, vehicle entry and exit corridors etc. we recommend a minimum of three coats depending on the volume of traffic and anticipated wear characteristics. Areas subject to excessive wear such as vehicle turning points, ATM locations etc. may need a top up coat on a more regular basis.
 
 
We point out that information is subject to change without notice. These suggestions and data are based on information we believe to be reliable. They are offered in good faith, but without guarantee, as substrate, methods of use of our products and actual site conditions are beyond our control. We recommend that the prospective user determine the suitability of our materials and suggestions before adopting them on a commercial scale.

Aquepoxy® is a registered trademark of Sandmar Products Australia Pty. Ltd.

 
 
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