How to Apply Slate Sealer How to Apply Slate Sealer

What You'll Need
Slate sealer
Grout mixture
Brushes

Slate sealer should be applied to slate tiles either on floors or walls to prevent cracking and other damage. Slate sealer, while not mandatory, will help keep your installation good for years to come, also providing it with a better, finished appearance.

Step 1  - Choose the Appropriate Sealer

You can go for either a matte or a glossy sealer according to your preference. Sealers also come in the topical variety, only covering the surface, while others penetrate the surface providing more protection of the stone. There are also water and chemical based sealers. Get the right sealer for your purposes at any home improvement store.

Step 2 – Mix the Sealer

Mix some of the sealer into the grout mixture as directed by the manufacturer’s instructions. Make sure that the mortar is dry before applying the grout.

Step 3 – Apply the Mixture

Apply the mixture, cleaning away any excess in the process. Leave it for about a week to dry thoroughly.

Step 4 – Apply the Sealant

Following the grain of the tile, apply an even coat of the sealer over the surface making sure that there are no streaks or drops. Allow it to dry for 2 hours, and then apply a second coat. Allow this to dry for a further 2 hours before using the surface.

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