Concrete Sanding by Hawk Concrete Floor Coatings

 

Surface Preparation, Diamond Grinding, & Epoxy Flooring

Concrete Sanding is one of several techniques employed to prepare a concrete floor for over-coating with paint, sealer, epoxy resin or some other resilient finish. Sanding is performed using drum sanders, rotary sanders, and hand-tool sanders for edging. The surface that hits the concrete is either sand-paper discs or sanding-screens with a range of different grit sizes to abrade harsher with deeper scratches, or softer with a smoother finish.

This process is used when the existing product does not need to be completely removed (if it has good adhesion to the slab), but “keyed” or scratched to promote inter-coat bonding.

Unlike sanding a soft wooden surfaces, sanding a concrete coating generally doesn’t remove the entire material from the surface – when this is required there are better ways to achieve this (see our Paint Removal Techniques page), often involving Concrete Grinding.

Prior to any sanding project, considerations need to be made regarding the product that needs to be re-applied. If the existing coating or paint is a durable two component epoxy or polyurethane, and it is to be coated with a similarly hard product, then you really need to both remove the gloss from the surface and leave micro scratches for key. A minimum of 120 grit would suffice.

However if a clear, or thin coat is being applied over the top then you would need to ensure that no part of the coating is removed, and a consistent finish is achieved with scratches minimal so as not to show through the final coats.

It is advisable to first assess the quality or paint/coating that you are sanding. If it is an acrylic paint (or in reality any type of “paint,” as Hawk CFC never recommends paint on concrete, but resins instead – see article: How Dulux Sourced Thousands of Loyal, Albeit Resentful Repeat Customers – Will You Be One?) then it should be removed completely as it will start to peel, and your higher quality top coating will fail along with it.

Hawk Concrete Floor Coatings specialises in all surface preparation and floor installation, for more information and pricing call today.

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Concrete Sanding

Concrete Sanding

Concrete Preparation

Concrete Preparation

Surface Sanding

Surface Sanding

Concrete Debris Cleanup

Concrete Debris Cleanup

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