Concrete Sealer Calculator

Calculate how much Concrete Sealer you will need

How our calculator works

• Enter your measurements: Put in the length and width in metres for your floor area, this allows us to calculate the total square metres.
• Choose how many coats: Two coats is recommended by most sealer manufacturers, but our calculator allows you to choose between one or two coats.
• See the result: And that's it, our calculator will then show you the total amount of concrete sealer you will need for your project in litres. Tins typically come in sizes of 5L at most retailers, and it's always worth getting that bit extra and be over rather than be under.

Frequently Asked Questions

How long does concrete sealer take to dry?

Drying times vary depending on the type of sealer, temperature, and humidity levels. In most cases, a concrete sealer will be dry to the touch within a few hours, but it is important to allow at least 24 hours before exposing the surface to heavy foot traffic. For vehicle traffic or heavy loads, waiting 48 to 72 hours ensures the sealer has fully cured and bonded with the concrete. If conditions are particularly cold or humid, drying may take longer, so always follow the manufacturer’s recommendations.

How many coats of sealer should I apply?

Most concrete surfaces require at least two coats for proper protection. The first coat penetrates the concrete or forms the base layer, while the second coat enhances durability and ensures even coverage. Highly porous concrete may require additional coats, while some high-performance sealers are designed for single-coat application. Always check the product guidelines to determine the right number of coats for your specific project.

Can I apply concrete sealer myself, or should I hire a professional?

Applying a concrete sealer is a task that can be done as a DIY project with the right preparation and tools. However, ensuring proper coverage, avoiding streaks, and achieving an even finish requires attention to detail. Professionals have the equipment and expertise to apply the sealer efficiently, especially for larger or more complex surfaces. If you are sealing a driveway, commercial floor, or decorative concrete, hiring a contractor may provide better long term results.

What happens if I apply too much sealer?

Overapplying concrete sealer can lead to issues such as a cloudy or tacky surface that does not properly cure. Excess sealer may form a film that does not bond well to the concrete, resulting in peeling or flaking over time. To avoid this, apply thin, even coats and allow proper drying between applications. If over-application occurs, using a solvent-based stripper or mechanical abrasion may be necessary to remove the excess sealer.