How Much Should It Cost to Seal a Patio? Patio Sealing Cost in 2026
The patio sealing cost is an investment in the appearance and protection of your outdoor space.
If your patio is looking a little dull, patchy, or starting to go green, sealing it can make a huge difference. But, how much does it cost to seal a patio?
Take a look at the Premium Paint breakdown of the average patio sealing cost in the UK, the factors that affect pricing, and why investing in a high-quality patio sealer can save you money over time…
Average Patio Sealing Cost in the UK
The average cost to seal a patio in the UK typically ranges between £200 and £500, depending on the size of the area and the products used.
|
Patio Size |
Typically Includes |
Average Cost |
|
Small patio (10–20m²) |
A basic clean and single coat |
£200–£250 |
|
Medium patio (20–40m²) |
Includes cleaning and two coats |
£300–£400 |
|
Large patio (40m²+) |
May include premium or anti-slip sealer |
£400–£500+ |
If you prefer to calculate by area, most professionals charge around £3–£5 per m² for sealing alone, or £5–£8 per m² if cleaning and sealing are both included.
Patio Power Washing and Sealing Cost Explained
In most cases, you can expect to pay between £200–£500, depending on the size of your patio, any cleaning requirements, and the type of sealer used.
While professional sealing costs more upfront, it often leaves the patio with a superior finish for lasting protection, and less maintenance in the long run.
If you don’t fancy paying someone to seal your patio for you, make sure your patio is protected with a high-quality patio paint sealer.
Protect and refresh your patio for superior results, lasting protection, and less maintenance.
Explore our full range of patio sealers and primers to find the perfect solution for your outdoor space.
What Does Sealing a Patio Involve?
Sealing your patio creates a protective barrier that prevents moisture, dirt, and algae from penetrating the surface. It also enhances colour, reduces fading, and makes cleaning easier.
The process usually includes:
-
Cleaning or power washing the patio – to remove dirt, moss, and algae.
-
Drying time – the surface must be completely dry before sealing.
-
Application of the patio sealer – often in one or two coats, depending on the type of sealer used.
-
Curing time – usually 24–48 hours before the surface can be walked on again.
Factors That Affect Patio Sealing Cost
Every patio has its own requirements, and these can affect the overall patio sealing cost. Take a look at the different factors you should consider:
1. Size and Condition of the Patio
Larger patios naturally require more sealer and time. If your surface is heavily stained or covered in moss, additional cleaning or treatment may increase the total cost.
2. Type of Sealer Used
High-quality or specialist patio paint sealers tend to cost more but last longer and offer better protection against UV damage and algae growth.
-
Acrylic sealers: Affordable and ideal for concrete or block paving.
-
Polyurethane sealers: Premium, long-lasting, and highly resistant to wear.
-
Water-based sealers: Eco-friendly, low-odour option that’s easy to apply.
3. Surface Type
Porous surfaces like sandstone and limestone absorb more product, meaning you may need extra coats. Dense surfaces like porcelain or sealed concrete usually require less.
4. Cleaning Requirements
If your patio needs power washing or algae removal before sealing, expect to pay an additional £50–£150 depending on the severity of the build-up.
5. Professional vs. DIY
Hiring a professional ensures even coverage and correct application, but doing it yourself can save on labour. However, DIY sealing requires the right tools and patience, especially when working with large areas.
Additional Costs to Consider
When budgeting for your patio sealing cost, you may also need to factor in:
-
Fungicide treatment: £20–£40 to kill existing algae and mould.
-
Sealant product: £30–£100 depending on brand and coverage.
-
Equipment hire (if DIY): Pressure washer hire costs around £30–£50 per day.
These extras are often included in professional services but are worth noting if you’re sealing your patio yourself.
Is the Patio Sealing Cost Worth it?
While sealing adds an upfront cost, it’s a long-term investment that saves money by protecting your patio from damage.
-
Stops green algae and moss growth
-
Prevents staining from water, oil, or rust
-
Enhances the natural colour of your paving
-
Reduces weed growth between slabs
-
Extends the life of your patio
How Often Should You Reseal a Patio?
Most patios need resealing every 3 to 5 years, depending on use and weather exposure. You’ll know it’s time for a fresh coat when:
-
Rainwater stops beading on the surface
-
The patio appears dull or patchy
-
Algae and dirt begin to return more quickly
Regular maintenance and resealing ensure your patio stays clean, safe, and vibrant all year round.
Professional Patio Sealing vs. DIY
|
Option |
Pros |
Cons |
|
DIY Sealing |
Cheaper if you already own equipment |
Risk of uneven coverage or sealer waste |
|
Professional Sealing |
Expert finish, includes cleaning, time-saving |
Higher upfront cost |
Premium Patio Sealers for Long-Lasting Protection
At Premium Paints, we supply a full range of patio sealers and primers designed to protect and enhance outdoor surfaces.
Our range includes:
-
Acrylic and polyurethane sealers for both patios and driveways
-
Anti-slip finishes for safety in wet weather
-
UV and weather-resistant formulas for lasting colour
-
Primers to improve adhesion and durability
Explore our full range to find the best option for your home or business.
