Review by the Guardian. If you want to do it yourself, go for a top-quality sealer that needs only one coat. Ultimate Slate Sealer from sealer-seal-sealant.co.uk, WAS £39.99 NOW ONLY £24.99 seals all Slate surfaces. Stephanie Zia.
Benefits of Ultimate sealer. Repels all liquids, prevents frost damage, protects against staining, non slip finish, leaves a natural finish, No harmful smells or residue are left. Ultimate Matt Lasts up to 15 years, Important - Only 1 good coat required.
Ideal for interior and exterior Polished and honed Slate, Apply with brush, cloth, roller or Spray gun. Wash all brushes in soapy water.
covers 8 to 10 sq metres per litre
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