Block Paving Sealing: The Complete UK Guide

The quick answer: Sealing block paving costs £3-8 per square metre (£120-320 for a typical 40sqm driveway) and lasts 3-5 years. It's optional but worthwhile if you have problems with ants, weeds, or oil stains, or simply want your driveway to stay cleaner longer.

This guide covers everything you need to know about block paving sealing - what it does, the different types, costs, and whether it's right for your driveway. For cleaning costs without sealing, see our block paving cleaning cost guide.

What Does Block Paving Sealer Actually Do?

Block paving sealer creates a protective layer over the blocks and, critically, binds the sand in the joints. Here's what it achieves:

Key Benefits

• Stops ants and insects: Ants love nesting in kiln-dried sand joints. Sealer locks the sand in place, making it impossible for them to burrow. This is the number one reason customers choose sealing.
• Prevents weed growth: Seeds can't germinate in sealed joints. Existing weeds must be removed before sealing - sealer won't kill them.
• Makes oil stains easier to clean: Oil sits on the sealed surface rather than penetrating the blocks. Fresh spills can be wiped away.
• Reduces moss and algae: Sealed surfaces don't hold moisture as readily, slowing biological growth.
• Enhances appearance: Depending on the sealer type, colours can be enhanced and the surface given a subtle sheen.
• Stabilises sand: Joints stay full rather than washing away in rain or being disturbed by traffic.

What Sealing Doesn't Do

• Doesn't make old paving look new: Sealer locks in whatever's there. Dirty or faded paving will look dirty and faded under sealer.
• Doesn't fix damaged blocks: Cracked, chipped or sunken blocks need repairing before sealing.
• Doesn't last forever: Expect 3-5 years before resealing is needed.
• Doesn't eliminate cleaning: Sealed surfaces still need washing, just less frequently.

Types of Block Paving Sealer

Wet Look Sealer

Appearance: Glossy, darkens colours, looks like the paving is permanently wet.

Best for: Red, orange and buff blocks where you want enhanced colour. Popular for driveways.

Considerations: Shows tyre marks more easily. Can look artificial on some paving. Very glossy finishes can be slippery when wet (look for anti-slip versions).

Price: £4-6 per sqm applied.

Matte/Invisible Sealer

Appearance: No visible change - the paving looks natural but has protection.

Best for: Natural stone effect blocks, grey paving, or anyone who doesn't want a glossy look.

Considerations: Still provides all the protection but without colour enhancement. Good choice if you're unsure.

Price: £3-5 per sqm applied.

Colour Enhancing Sealer

Appearance: Deepens and enriches faded colours without heavy gloss.

Best for: Older paving that's faded over the years. Brings back some of the original colour.

Considerations: Results vary depending on how faded the original paving is. Won't restore heavily worn blocks.

Price: £4-7 per sqm applied.

Solvent-Based vs Water-Based

Solvent-based: Penetrates deeper, more durable, stronger smell during application, longer drying time. Generally considered higher performance.

Water-based: Lower odour, faster drying, easier to apply, more environmentally friendly. Good for occupied properties where smell is a concern.

Block Paving Sealing Costs (2026 UK Prices)

Professional Application Costs

• Sealing only: £3-8 per sqm
• Typical 40sqm driveway: £120-320
• Typical 60sqm driveway: £180-480
• Small 20sqm patio: £80-160

What Affects the Price?

• Type of sealer: Wet look and colour enhancing cost more than matte
• Number of coats: Some sealers need two coats for best results
• Condition of paving: More prep work = higher cost
• Size of area: Larger areas have lower per-sqm costs

Cleaning + Sealing Packages

Most sealing is done immediately after professional block paving cleaning. Package prices:

• Clean only: £3-6 per sqm
• Clean + matte seal: £6-10 per sqm
• Clean + wet look seal: £7-12 per sqm

For a 40sqm driveway, cleaning and sealing together typically costs £280-480.

How Long Does Sealer Last?

Expect quality block paving sealer to last:

• Driveways (regular traffic): 3-4 years
• Patios (foot traffic only): 4-5 years
• High-traffic areas: 2-3 years
• Wheel tracks specifically: 2-3 years (wear faster than rest of driveway)

Factors That Reduce Lifespan

• Heavy vehicle traffic
• Power steering turning on the spot
• Direct sunlight (UV degradation)
• Poor initial cleaning before sealing
• Low-quality sealer products
• Application when too cold or damp

The Sealing Process: What to Expect

Step 1: Professional Cleaning

The paving must be thoroughly pressure washed to remove all dirt, moss, algae and old failed sealer. This typically takes 2-4 hours for a driveway.

Step 2: Re-Sanding

Kiln-dried sand is swept into all joints. This must be done before sealing - the sealer binds this sand in place.

Step 3: Drying Time

The paving must be completely dry before sealing. Minimum 24-48 hours in dry weather. Sealing damp paving causes white hazing.

Step 4: Sealer Application

Sealer is applied by low-pressure sprayer or roller. Even, consistent coverage is essential. Most sealers need 2 coats for durability.

Step 5: Curing

Keep off the paving for 24 hours minimum. Full cure takes 48-72 hours. No vehicles for at least 48 hours.

Can I Seal Block Paving Myself?

DIY sealing is possible but the most common cause of sealer failure is inadequate preparation:

DIY Requirements

• Properly cleaned paving: Professional pressure washing recommended
• Re-sanded joints: Kiln-dried sand only (not builders sand)
• Bone dry surface: 48 hours minimum dry weather before sealing
• Quality sealer: £60-120 for 40sqm (don't buy cheap unbranded products)
• Low-pressure sprayer or roller: £20-50
• Dry weather forecast: No rain for 24-48 hours after application

Common DIY Mistakes

• Sealing over dirt: Locks in staining permanently
• Sealing when damp: Causes white cloudy patches that can't be removed
• Uneven application: Creates blotchy appearance
• Cheap sealer: Yellows, peels, and fails within months
• Wrong type for surface: Some sealers aren't compatible with certain blocks

Is Block Paving Sealing Worth It?

Sealing Is Worth It If:

• You have ant problems in your driveway
• Weeds keep growing despite removing them
• You park vehicles that might drip oil
• You want to reduce cleaning frequency
• You like the wet look appearance
• Your paving is in good condition and you want to keep it that way

Sealing May Not Be Worth It If:

• Your paving is old and heavily worn
• There's significant damage needing repair first
• You have no ant or weed problems
• Budget is very tight (cleaning alone still helps)
• The paving is in heavy shade (less sun means slower sealer degradation anyway)

Get a Quote for Sealing

We offer block paving cleaning and sealing throughout Surrey, including Redhill, Reigate, and all surrounding areas. We'll advise honestly whether sealing is worthwhile for your specific situation - sometimes cleaning alone is the better choice.

Get My Free Quote

Related guides: Block Paving Cleaning Cost UK | Driveway Cleaning & Sealing Cost | Driveway Cleaning Costs UK | Can Pressure Washing Damage My Driveway? | How Often to Clean Your Driveway | How to Prepare Your Driveway