Concrete Sealers & Coatings

Choosing a sealer to use on concrete driveways is usually a balance between price, performance and appearance.

Applying a good quality sealer to a well prepared surface following the manufacturer’s recommendations will ensure your concrete driveway, path, patio area and pool surround will be kept in good condition over time.

The type of finish you have on you concrete driveway, path, patio area and pool surround will determine which type of sealer is recommended.

Before

After

Sealed / Unsealed

Penetrating Sealer

Type of Sealers Used:

Solvent Based Acrylic Sealers

Solvent based acrylic sealers are the most popular sealer used on concrete driveways, paths, patio area and pool surrounds. Solvent based acrylic sealers will protect and enhance the surface and colour of your concrete whilst providing protection from the elements. It is widely used by professionals and D.I Y applicators. The sealer is easy to apply and also reasonably priced.
For more information or data sheet please contact Concrete Colour Solutions.

Waterbased Acrylic Sealers

Water based acrylic sealers are becoming more popular as technology advances.The have the benefit of water dilution and clean up, good durability, low odour (VOCs)with improved hardness and flexibility.
For more information or a data sheet please contact Concrete Colour Solutions.

Polyurethane Sealers

Polyurethane sealers are a superior grade sealer which can be used on all surfaces from domestic applications such as driveways, internal flooring and garage floors. It also has uses in industrial applications.

Polyurethane sealers are available in a solvent base which have excellent gloss and bond strength. Polyurethane Sealers are also available in a waterbase which have more of a satin appearance while not reducing bond strength. Water based sealers have low odour (VOCs) and are suitable for internal use.

Both waterbased and solvent based polyurethane sealers have greater durability in comparison to acrylic sealers.

For more information or a data sheet please contact Concrete Colour Solutions.

Epoxies

Epoxy coatings are traditionally used in industrial and commercial applications however they are becoming increasingly more popular in internal and decorative use.

Epoxy coatings are high gloss with tenacious bond strength making them an extremely popular choice for durable coating over a wide range of applications eg: flake flooring, garage/shed/work bay floor coating and commercial floor coatings.

Penetrating Sealers

Penetrating Sealers are used extensively for protection of concrete, bricks, masonary, pavers and sandstone. The sealer penetrates deeply into the surface and protects against water absorption. Penetrating sealers also help repel oil and organic based stains and will not change the appearance of the surface leaving it with a natural look.

For more information or a data sheet please contact Concrete Colour Solutions.

Densifiers

Densifiers are a waterbased penetrating hardener, dustproofer and densifier for a polished or steel trowel concrete floor. Densifiers increase abrasion resistance and reduce absorption of liquids into the surface.

What are the benefits of sealing?

Sealer allows improved cleanability of the surface. Staining is reduced, and any stains that do occur are more easily removed or fixed. When the correct sealer is used on new surfaces it may also aid curing the concrete. Decorative concrete should always be sealed on the day it is placed as it helps cure and protect the surface.

Can home owners seal their own concrete?

Yes, as long as they follow the manufacturer’s instructions.

What is the coverage rate of sealer?

Normal coverage is 3-5m2 for 1 litre of sealer.

What happens if the concrete is not sealed?

Unsealed decorative concrete surfaces will still be serviceable but may stain more easily. Sealer stains less readily than concrete and if it does stain it is a lot easier to clean or fix than unsealed concrete.

When should I reseal?

Resealing may be necessary when signs of wear or weathering become apparent (this may include flaking, peeling or “patchiness”). The most common sign of wear or weathering is when the pavement appears “faded” but darkens when wet.

How long will the sealer take to cure?

Curing times are dependent on ambient conditions. Under normal conditions sealer may take up to 1 week (7 days) to fully cure. Under milder conditions it can take longer. Exact curing times will vary from job to job. Driving on uncured sealer may reduce its lifetime.

Why does the concrete appear faded but darkens when wet?

The concrete may need resealing. If sufficient sealer is present (i.e. has been recently sealed/resealed) it may need a light solvent scrub. It is important to note that there may be a change in colour shade as the concrete cures.

I have seen small bubbles on the surface of the sealer, how are they caused?

Small bubbles may form if the sealer is applied thickly or if a roller is pressed too hard during application. A light scrub with solvent will reduce the amount of bubbles on the surface of the sealer. This should not be confused with sealer blistering which occurs when the sealer surface “skins” before the bottom of the sealer has cured. The solvent in the uncured bottom layer sealer may be trapped between the concrete and the “skin”, causing blisters. This is often caused by applying sealer too thick or applying a second coat before the first has sufficiently cured on temperature. High temperatures or wind will also cause sealer to blister.

There are lots of fine cracks in the sealer

If the sealer dries too quickly, fine plastic shrinkage cracks can form (also called “crazy” cracks). Accelerated drying can be caused by wind as well as heat. A light solvent scrub may reduce the effect when it is confined to the sealer.

What if there is peeling/flaking sealer present?

Old sealer may start to peel at the end of its service life or may be a result of excessive wear. Adhesion may also be compromised by blisters/moisture in the sealer left for prolonged periods or by rising damp. Smooth surfaces (such as a steel trowel finish) may peel if not acid etched before sealing. Peeling sealer will need to be removed before any resealing is undertaken.

What if a client insists on sealing a medium/steep slope or smooth surface?

The manufacturer does not advise sealing a sloped or smooth concrete. If the home owner insists, then the minimum amount of Concrete Sealer should be used. The use of Slip Resistant Powder is also suggested. Slip Resistant Powder is mixed into the sealer before application or fine glass is cast on top during application.

What influences the expected service life of sealer?

The type and frequency of traffic, along with the weather conditions all play a part in how long the sealer may last. Furthermore, traffic over excess dirt, friction (e.g. from tyres), and other excessive wear and tear (e.g.heavy traffic) may reduce the life of the sealer. Regular maintenance can help extend the useful service life of sealer.

For more information or data sheets on any of the above please contact Concrete Colour Solutions