What sealer does
- Binds the kiln-dried sand in the joints so it does not wash out
- Reduces oil and food staining
- Can enhance colour, depending on the product
- Makes sweeping and washing easier
Finishes
Matt finishes change the look least. Colour-enhancing and satin finishes make the paving look as it does when damp. Wet-look gloss finishes can feel slicker when wet, so on slopes we use matt or satin products or an anti-slip additive.
How long does sealer last?
Typically three to seven years, less on shaded north-facing drives and in wheel tracks. Acrylic and polyurethane sealers are the common choices for block paving.
When not to seal
- Within a few months of new paving being laid (let moisture and efflorescence clear)
- On damp paving
- On permeable paving, unless the product is breathable and approved for it
- Before sunken areas are repaired
More questions
How much does sealing cost?
Sealing alone is £5–£15 per m²; a clean, re-sand and seal package is £8–£20 per m².
Written by the Block Paving Contractors survey team
Reviewed 9 November 2026. Sources include the BS 7533 series, Interpave and manufacturer laying guidance, GOV.UK, gov.wales, gov.scot and nidirect planning guidance, and the Consumer Contracts Regulations 2013.
Reviewed 9 November 2026. Sources include the BS 7533 series, Interpave and manufacturer laying guidance, GOV.UK, gov.wales, gov.scot and nidirect planning guidance, and the Consumer Contracts Regulations 2013.
Related services
Block paving sealing
Sealer applied to clean, dry paving to hold the joint sand in and resist stains.
From £5 per m²Learn more →
Block paving cleaning
Moss, algae and grime lifted with a rotary cleaner, then the joints re-filled.
From £2.50 per m²Learn more →
Re-sanding and re-jointing
Empty joints refilled with dry jointing sand and vibrated in, so blocks lock again.
From £3 per m²Learn more →More guides
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- Permeable vs standard block paving: which do you need?
