Surface Preparation
Cleaning
Concrete is to be clean and free of grease, oil and any other contaminants. A stiff broom and general-purpose cleaner are recommended.
Pressure clean at minimum 2000 psi to clean and remove all contaminants. Allow surface to dry before resealing.

Surfaces previously sealed with acrylic resin coatings.
1. Carry out Xylene test to confirm acrylic resin coating. Place a 10cm2 piece of cotton cloth on a sealed surface. Pour Xylene on the surface to saturate the surface. Cover with a sheet of cling film. Wait for 30 minutes. Remove the cloth and observe the surface. If coating dissolves, can be wiped away, or softens and becomes sticky, then the surface has an acrylic resin coating. If the surface is acrylic resin, use the Dulux Avista Waterbased Sealed Surface Primer. If the coating wrinkles, then it is likely an alkyd, or if there is no reaction, then it is likely to be an epoxy or polyurethane. In these instances, DO NOT USE Dulux Avista Sealed Surface Primer and seek technical advice or contact a professional applicator.
2. Clean the surface with a general-purpose cleaner and allow it to dry.
3. Apply 1 coat of Dulux Avista Sealed Surface Primer using a 15mm nap roller. Allow to dry.
4. Reference Dulux Avista Concrete Sealer Waterbased Tintable Base TDS for topcoat application instructions.
If the surface has been sealed on multiple occasions, a crosshatch test should be done to check whether the surface needs to be stripped before
applying the sealer.

Previously sealed concrete surfaces
A cross hatch test is required if the surface has been sealed more than 2 years ago to ascertain whether existing sealer is suitable to be resealed
over.
1. Use a sharp blade to create a light “crosshatch” incision through the sealer.
2. Place a piece of self-adhesive tape (suggest clear packing tape) over the incision.
3. Press firmly for maximum adhesion and remove sharply. Repeat with fresh tape several times. If sealer is present on the tape, it is advised the sealer be completely stripped from surface. Seek professional contractors should stripping be required. If there is no sign of sealer adhering to
the tape or delaminating from the surface, this would indicate that the bond of the existing sealer is sufficient for resealing.
Important note: If existing sealer shows signs of whitening or blooming, regardless of cross hatch test results, sealer may need to be stripped
completely from the surface. Whitening may reoccur if new coat of sealer is applied over this problem.

Application Method

Brush (50-65mm high quality brush) and roller (15mm nap, 230mm or 270mm wide microfiber roller)

Stir thoroughly before and during use. Apply at least one coat of Dulux Avista Sealed Surface Primer

1. Mask all adjacent surfaces to prevent product contaminating areas that are not needed for the application.
2. Use a brush to apply to any edges and hard-to-reach places.
3. Then, use a roller to apply 1 coat of Dulux Avista Sealed Surface Primer evenly across the surface.
4. Lay off. Once section is coated, gently go over the surface in the same direction with an unloaded roller using minimal pressure. This will give a smooth consistent finish. Using poor quality or worn rollers can affect the final finish achieved.
5. Allow the coated surface to dry.
6. Apply desired Dulux Avista Concrete Sealer Waterbased Tintable base as a topcoat.