Diggers Slate Sealer

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Diggers Slate Sealer is an acrylic-resin surface sealant that dries to a strong and highly durable finish. It dries to a clear gloss finish and enhances the colour of the slate.

Allows protected surface to be easily washed and maintained. First coat covers approx. 7m² per litre and second coat approx. 10m² per litre. Available in 1L, 4L, and 20L.


Typical Uses:

  • Slate tiles.
  • Grouted joints.
  • Protects natural stone surfaces against soil.
  • Protects against food and household chemical stains.

If the surface needs to be recoated, simply wash, dry and apply. The new coating will “cut” into the previous coat to combine the two coats.


1. If the slate is currently coated with an unknown sealer, test on a small area first and allow to stand for 24 hours. If a reaction occurs, the sealer will need to be stripped before applying.
2. All surfaces should be thoroughly cleaned. Grout and mortar residue must be removed before sealing the surface. Use Diggers Hydrochloric Acid (mix 1 part acid with 8 parts water) and wash off completely to ensure no white patches are caused by acid residue left
trapped under the sealer.
3. When surface is dry, sweep off any dust with a soft broom.
4. Diggers Slate Sealer should be applied when surface is cool e.g.
early in the morning. Apply to surface using a soft brush (75–100mm)
to avoid creating streaks in the acrylic coating.
5. Allow the first coat to dry for 2 hours before applying a second coat.
A minimum of 2 coats should be applied to any new unsealed surfaces.
Use multiple coats to achieve a glossy finish.
6. Allow the final coat to cure for at least 24 hours before use. Clean up with Diggers Xylene.

Note: In outdoor high traffic areas, Diggers Slate Sealer will need to be recoated regularly to maintain finish.


Wear suitable protective clothing, gloves and eye / face protection when using this product.

Click here for Diggers Slate Sealer MSDS.