Dulux Avista Concrete Sealer Pre-Sealer is a solvent based clear coating for use as a sacrificial sealer coating on freshly laid concrete, to help protect the substrate from weather and ingress of dirt and grime in the short term.
Touch Dry
1 Hour
Cleaning materials
Dulux Avista solvent
Application Tools
Air Spray, Brush, Roller, Broom
Do not seal in high winds or if rain is likely.
Do not apply over surfaces painted with water based or alkyd paints.
Not suitable for food preparation areas.
Not a waterproofing membrane.
Not recommended to seal at extreme temperatures below 8°C and above 35°C.
Not to be used as a final sealer.
Application of sealer can lower slip resistance (slip resistance additives available).
Important note: Surfaces with a slope of 1:8 (1 metre fall across 8 metres of distance) or greater are not recommended for coating, even with the addition of Dulux Avista Slip Reducing Additive. Contact Dulux Avista for further advice.
Primer/first Coat for unsealed, cured concrete surfaces
Ensure concrete is sufficiently cured (recommended minimum 14 days). Concrete is to be clean and free of grease, oil, paint or any curing agent. Stiff broom and general purpose cleaner recommended. Any oil stains should be treated & cleaned with an industrial degreaser. Pressure clean surface at minimum 2000 psi and allow to dry. Acid etch with hydrochloric acid. Dilute approximately 20 parts water to 1 part acid (depending on porosity) to remove any loosely bound cement and laitance. Apply diluted acid to surface using a large head watering can, applying in a criss cross motion (approximately 5-10m² sections). Acid will start to fizz on the surface once it starts to react with the laitance in the concrete. Pressure clean immediately to clean and remove all remnants of acid (do not allow acid to dry on surface). Pressure clean at minimum 2000 psi. Allow surface to dry before sealing (sealing over damp concrete will cause whitening).
Note: Acid etching should always begin at the lowest point of the surface & proceed uphill.
Freshly laid concrete
No preparation required when being used as a sacrificial same day sealer. Surface must be hard enough to walk on & free of any surface water.
Sealer to be applied by a suitable solvent resistant broom or 11mm-22mm nap roller. Roller used will depend on the profile of the concrete. The sealer must be mixed prior to application using a stirrer or paddle.
To apply sealer, pour sealer into a roller tray, and evenly roll or broom onto the surface.
Ensure sealer is not applied too thick and no pooling occurs as this may cause bubbling.
Avoid excess sealer build up on the edges of the roller. This can lead to roller lines in the surface.
An additional coat of sealer can be applied after a minimum of 2 hours, (recommended recoat 2 hours)
Surface must be overcoated with one of the below Dulux Avista sealers once concrete has cured (minimum 14 days, 30 days recommended). This must occur within 3 months of the Pre-sealer being applied. Pre-sealed surface must be acid etched & pressure cleaned prior to sealer being applied. Refer to the acid etching process outlined in the relevant Dulux Avista TDS.
Compatible Dulux Avista Sealers
