FAQ

Q. RESEALING CONCRETE PAVING

A. In general, applying a new coat of sealer over existing sealed concrete simply involves cleaning the surface and applying one or two coats. Care must be taken to remove grease, oil, mildew, moss and similar contaminants before coating. For further information, please refer to the relevant Application Data in our Product Support area.

Q. DAMAGED SEALER

A. Petrol, brake fluid, mower fuel, acids and many household chemicals and cleaners can damage clear and coloured sealer. Cleaning and stripping damaged areas with Solulene ™ or Sealer Strippa followed by resealing may be required to disguise discoloured areas.

Q. PATCHY COLOURED SEALER

A. Moisture and dew when applying sealer can cause colour and gloss variations in a newly applied sealer. This can also be due to not mixing or applying the sealer correctly. Usually, reactivating the surface with Solulene ™ when the weather is more suitable will remove the patchy appearance. A further coat of sealer may be required.

Q. POWDERY DAMAGED CONCRETE

A. If the concrete surface is soft and powdery, sealing the surface without prior preparation is not recommended. First, apply a surface hardener such as ReactaCon before sealing. In worst cases grinding the concrete surface may be required to remove the damaged surface before sealing.

Q. WHITE PATCHES ON SEALER

A. When water is removed from the concrete surface by evaporation, dissolved salts are carried to the surface and deposited.

These soluble salts are produced by concrete during curing and in wet weather they are transported onto the surface of concrete paving. This is commonly referred to as Efflorescence. Reactivate the surface with Solulene™. This may take one or two coats.

Q. REMOVAL OF BLACK TYRE MARKS

A. Acrylic concrete sealers are manufactured from thermoplastic resins which can be burned by spinning or skidding rubber tyres leaving ugly black marks. These marks cannot be washed off because the rubber and burnt sealer become imbedded in the surface.

Sometimes a particular tyre compound is affected by the solvent which continues to evaporate from curing sealer over a period of up to several months. In rare cases during hot weather, these tyres may leave black imprints on clear or coloured sealer. Solulene™ may help remove these imprints, and then a coat of sealer may be needed.

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