Surface Preparation
Dulux Avista Waterbased Bare Concrete Primer requires a clean surface to adhere. All grease, oil, mould, and dirt contamination must be removed, or the primer will not penetrate and adhere.
Surface must be prepared by pressure washing and etching as per following process.

All New and Bare concrete surfaces
On all surfaces, cleaning is the most important step. The concrete must be cleaned well and profile correctly.
1. Ensure concrete is fully cured (14–30 days depending on conditions) and free of grease, oil or paint. Clean surface with a commercial grade, general purpose cleaner.
2. Acid etch using Dulux Avista Hydrochloric Acid (dilute approximately 20 parts water to 1 part acid). Dulux Avista Hydrochloric Acid should not
be allowed to dry. Some reaction products from the acid may form insoluble residue. If this occurs and the surface dries, these residues will be very hard to remove.
3. Pressure clean the surface before acid dries. Use a squeege to remove excess water.
4. Pour Dulux Avista Waterbased Bare Concrete Primer into a roller tray and apply 2 even coats onto the surface using a good quality roller. Under hot conditions, make sure the surface is damp before application.
5. Allow 1 hour between coats.
6. Reference Dulux Avista Concrete Sealer Waterbased Tintable Base TDS for top coat application instructions.
NB: Acid alone will not clean the concrete, nor will it break down oils and silicone residue. Acid only works by reacting with the alkaline salts in the
concrete. If the concrete is covered with these residues, the acid will likely just sit there and do nothing.
NB: Dulux Avista Waterbased Bare Concrete Primer can be applied to damp concrete. The bare concrete must be absent of any ponded surface
water and preferably be on its way to being noticeable dry before the primer is dried

Application Method

Brush (50-65mm high quality brush) and roller (15mm nap, 230mm or 270mm wide microfibre roller). If spraying, ensure even film build and correct

spread rate. Stir thoroughly before and during use.

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 Waterbased Bare Concrete Primer evenly across the surface.
4. Allow the coated surface to dry for 20 minutes.
5. Apply a 2nd coat and allow to dry for 1 hour.
6. Apply desired Dulux Avista water-based topcoats.