Slate Sealer 321

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Slate Sealer 321

Slate Sealer 321

Slate Sealer 321 has been designed to enhance and protect slate and natural hard stone surfaces. It will dry to a high gloss ‘wet look’ clear finish and provide a smooth washable surface which protects from stains, spills and reduces the ability of moulds, algae and lichen to discolour the surface. As a  UV stable solution acrylic with excellent optical clarity it is designed to provide many years of service for both indoor and outdoor natural stone surfaces.

Base 321 Slate Sealer is well suited to protecting new surfaces or restoring aged and faded surfaces. It provides a high gloss finish while enhancing the natural colours in the slate and seals porous grouts to resist staining. Marks and scratches can be easily repaired and it can be re-coated with minimal surface preparation.


  • Enhances natural colours
  • Protects from stains
  • UV Stable suitable for internal and external use
  • Wet-look finish

Coverage is approx. 7m² per litre - allow approx 1 x 5ltr pail per 17.5m² of concrete (2 coats) 

Important Information!

For the first coat only add 20% Solvent 399 to ensure penetration and adhesion. Other solvents are not recommended for use with Slate Sealer 321 as they may affect dry times, and clarity of the coating.

Slate Sealer 321 is a solvent based sealer and has a strong odour – apply in well ventilated areas only. For internal application ensure doors and windows are left open during initial 12hour curing period. Vapours may linger for up to 3 days during curing.

Highly flammable – take all precautions to ensure no source of ignition is present when applying or during initial 24 hour curing period.



  No. of coats:

 2 - 3

  Coverage Rate:

 approx 7m² / litre

  Drying Time:

 Recoat: 2 - 4 hours
 Dry:     24 - 48 hours

  Fully Cured:

 3 Days

  Clean up:

 Solvent 399

  Shelf Life:

 24 months

  Store Below:


  Application Temperature (Surface):

 10°C - 35°C


 Roller, Sprayer, Brush, Broom, 


Application Guide

Data Sheet