Is Professional Driveway Sealing Worth the Cost?
Updated: Sep 16
Table of Contents
What Professional Driveway Sealing Actually Does
The Benefits of Sealing Block Paving and Other Surfaces
The Drawbacks and Ongoing Costs to Weigh Up
The Best Time of Year for Driveway Sealing
How to Maintain Indian Sandstone Patios After Sealing
DIY Sealing Versus Hiring a Professional
When Sealing Is Most Worth It, and When It Isn't
Frequently Asked Questions
Last Updated: September 14, 2026
What Professional Driveway Sealing Actually Does
Professional driveway sealing is the application of a suitable protective sealer to clean, sound paving to help reduce staining, slow surface weathering and make routine cleaning easier. It is a finishing stage, not a repair: sealing cannot correct loose, sunken or inadequately bedded paving, and it does not replace sound construction, falls or drainage.
At SavingPaving, we treat sealing as the final step of a wider restoration sequence, and only where the paving and its condition suit it. The correct order matters more than the product:
Survey the paving and identify the material
Apply biocidal pretreatment where growth is present, then allow suitable dwell time
Clean professionally, with methods matched to the surface
Complete repairs, including lifting and relaying loose or sunken slabs where needed
Remove failed pointing and repoint or joint as appropriate
Allow the paving and joints to dry suitably
Skip a step and the sealer simply traps problems underneath. Most disappointed homeowners we speak to were sold a coating, not a process.
The Benefits of Sealing Block Paving and Other Surfaces
The benefits of sealing block paving and other suitable surfaces come down to protection and presentation. A correctly specified sealer may reduce how quickly dirt and staining take hold, make routine cleaning easier, and deepen the appearance of the paving. On block paving, sealing also follows re-sanding with kiln-dried jointing sand, which helps hold the jointing material in place.
Where it helps most:
Block paving that has been cleaned and re-sanded
Indian sandstone and natural stone patios in sound condition
Paving regularly marked by leaf tannin, moss or general grime
Where it does not help:
Paving with loose, rocking or sunken slabs
Joints that have failed and need repointing first
Surfaces where drainage or falls are already poor
Sealing may reduce how often growth returns, but it cannot guarantee permanent prevention. Black spot and lichen colonise suitable paving surfaces regardless of joint condition, so a sealer is one part of ongoing maintenance, not a permanent cure.
The Drawbacks and Ongoing Costs to Weigh Up
The honest drawbacks are preparation demands and repeat visits. Sealing only performs as well as the cleaning and repairs beneath it, so it adds a stage to any restoration. It is also not a one-off: depending on the paving, exposure and foot or vehicle traffic, a sealer may need reapplying periodically, which means future cost and future disruption.
Three further points worth weighing:
Poor timing wastes money. Sealing damp paving or applying it before joints have dried properly can lead to patchy results.
Not every surface suits every sealer. Suitability depends on the paving, its condition, joint dimensions, drainage and exposure.
It is not a substitute for repairs. If slabs are moving, jointing alone will not secure them; those areas need assessment, and where appropriate, lifting and relaying first.
Pricing depends on the size of the area, the paving type and the condition of the surface, so we quote after a free site survey rather than over the phone. You can see how we approach this on our sealing and maintenance page.
The Best Time of Year for Driveway Sealing
The best time of year for driveway sealing is generally a dry spell in spring or early autumn, when temperatures are mild and paving has time to dry thoroughly. Sealer needs dry conditions to cure properly, so a settled forecast matters more than the calendar.
Summer works well, provided the paving is not so hot that the sealer dries too quickly. Late autumn and winter are usually poor choices: shorter days, damp air and frost risk all work against a good finish. If growth is heavy, we would rather pretreat and clean first, then return to seal once the paving and joints have dried suitably.
How to Maintain Indian Sandstone Patios After Sealing
How to maintain Indian sandstone patios after sealing comes down to gentle routine care. Sweep regularly, clean spills promptly, and wash with methods suited to the stone rather than reaching for the strongest option available. Sandstone is porous and can be marked by tannin, algae and general grime if left.
A sensible routine:
Sweep or brush the patio every few weeks
Deal with spills and leaf litter before they stain
Wash with a suitable cleaner, using pressure and equipment matched to the stone
Watch joints for failed pointing and arrange repointing where needed
Book periodic biocidal maintenance to keep growth in check
SavingPaving offers six-monthly aftercare and biocidal maintenance for restored paving, which suits homeowners in South Croydon and Bromley who would rather protect the work than start again. Where black spot or lichen is established, we treat it as part of black spot removal before any sealing is considered.
DIY Sealing Versus Hiring a Professional
DIY sealing versus hiring a professional usually comes down to preparation, not the sealer itself. The coating is the easy part. Cleaning the paving properly, pretreating growth, allowing dwell time, repairing loose slabs, repointing failed joints, re-sanding block paving and waiting for the right drying conditions is where most DIY attempts fall short.
The most common DIY problems we are asked to put right:
Streaky, patchy finishes from uneven application
Sealer applied over damp paving or joints that had not dried
Sealer applied over growth or grime that should have been removed first
Paving sealed before repairs, so movement was coated over rather than addressed
Our own team of three to four uniformed, fully insured operatives works to a set sequence and selects methods to suit the material and its condition. That is the practical difference between hiring a pressure washer and commissioning a restoration.
When Sealing Is Most Worth It, and When It Isn't
Sealing is most worth it when the paving is sound, has just been cleaned and repaired, and you want to protect that work and keep maintenance manageable. It is least worth it when the real problem is movement, failed bedding or widespread joint failure, because sealing will not fix any of those.
Situation | Sealing Worth It? | What to Do First |
Clean, sound block paving after re-sanding | Yes | Seal once joints are dry |
Sandstone patio with light staining | Often | Clean, treat growth, then seal |
Loose or rocking slabs | No | Assess and lift and relay where needed |
Failed pointing across the patio | No | Remove and repoint or joint first |
Heavy black spot and lichen | Not yet | Pretreat, clean, then reassess |
Widespread bedding failure | Unlikely | Specialist assessment may be needed |
The pattern is consistent: sealing protects good paving and finishes good restoration work. It does not rescue paving that needs repair.
Most homeowners asking whether professional driveway sealing is worth the cost are really asking whether their paving can be saved. Often it can, provided the cleaning, repairs and jointing are done properly first, and that is exactly the sequence SavingPaving follows. We offer free site surveys and detailed quotations, so you know what your driveway or patio needs before committing, with no hidden costs. Our team restores block paving, Indian sandstone, natural stone, crazy paving, porcelain and man-made slabs across South Croydon, Bromley and nearby areas, with sealing, repointing and six-monthly aftercare available where suitable. Get started with SavingPaving and protect the paving you already have.
Frequently Asked Questions
Does sealing a driveway really prevent weeds?
Sealing does not stop weeds completely. Weed seeds germinate in debris and soil that collect in joints and cracks, and sealing can reduce how much of that debris settles in, which may slow regrowth. Because black spot and lichen colonise the paving surface itself and are not caused by failed joints, sealing alone will not remove them either. A realistic expectation is that sealing, combined with proper jointing and periodic maintenance, may reduce growth rather than eliminate it.
Is it better to DIY or hire a professional for driveway sealing?
It depends on the surface, its condition and your confidence with the products. Sealing is only worth doing after the paving has been assessed, cleaned and, where needed, repaired and re-sanded, because trapping dirt or moisture under a sealer causes problems. A professional can identify loose or sunken slabs first, choose a sealer suited to the material, and apply it in suitable weather. If you are unsure, a free site survey is the sensible starting point.
Can you seal a driveway that has existing black spot or lichen?
Sealing over active black spot or lichen is not advisable. These growths colonise suitable paving surfaces, and sealing on top can trap them and make later treatment harder. The usual approach is to pretreat, allow a suitable dwell time, clean the paving, treat any remaining black spot or lichen, and only seal once the surface is clean and dry. Whether sealing is appropriate at all depends on the paving type and its condition following assessment.
Does sealing affect the colour of block paving or Indian sandstone?
It can. Some sealers deepen and enrich the colour, while others are designed to leave the appearance largely unchanged. On Indian sandstone in particular, the effect varies with the product and the stone itself, and a small test area is worth checking before the whole patio is treated. If you want the colour to stay as close to the original as possible, say so during the survey so a suitable sealer can be specified.