Surrey · England
Remedial sealant & repairs in Box Hill, Surrey
Our applicators work in Box Hill on removing failed, mouldy or leaking sealant and putting it right. Old material cut out, joints cleaned and sealed neatly.
- Torn expansion joints
- Sealant applied over old sealant that has lifted
- Leaks that keep coming back after resealing
Remedial sealant in Box Hill
With more than 20 years’ experience, our applicators have seen most of the ways sealant can fail. We are fully insured ARBOMaster approved applicators, and every remedial job comes with a 12-month guarantee. We work on botched or over-sealed joints, failed movement joints and mouldy bath & shower sealant, and the jobs we see most are dark patches showing through the sealant and kitchen joints letting water behind the worktop.
In a village or hamlet like Box Hill, homes are often older cottages and farmhouses alongside a few newer houses. Movement in older walls and floors tends to show first as cracked grout or split sealant.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Place
- Box Hill (KT20)
- Wider area
- Surrey
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Honest limits
We won’t take on work that will not last, so here’s what sealant cannot put right:
- A cracked shower tray or bath (that needs repair or replacing)
- Sealant in an older building that needs testing for asbestos first
- A tray or worktop that needs refixing first
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Box Hill
- Mouldy bath & shower sealant
- Expansion joints
- Shrunken worktop sealant
- Failed movement joints
- Botched or over-sealed joints
- Leaking tray & enclosure joints
What remedial sealant looks like in Box Hill
Hard water is the norm across most of the South East, so limescale builds up on sealant, grout and fittings.
For an older house near a landmark such as St. Andrew's Church, timber floors under older bathrooms flex, so joints need a sealant that moves with them. Letting a property close to Betchworth station? Then botched sealant from a previous quick fix is easier to strip out between tenants. Managing a site like The Ashcombe School? Then washroom and kitchen sealant there needs the same care as at home, and schools and businesses are part of our work as well as homes.
Box Hill is about 2 miles north-east of Dorking, in Surrey. For remedial sealant in and around Box Hill, it’s easy to get a quote: please phone 0345 464 0079 or email us. We are based in Crawley and cover Surrey, Box Hill included. Box Hill is one of 395 places in Surrey where we work for remedial sealant. Crawley is on our list too, about 11 miles from Box Hill.
All of KT20 is covered for remedial sealant. Remedial sealant is available to properties on Boxhill Road, Usherwood Close and Fort Road. We also cover Betchworth (1 mile south-east), Brockham (1 mile south), Buckland (1 mile south-east), Strood Green (2 miles south) and Headley (2 miles north). Larger places within reach include Guildford (12 miles west), Woking (13 miles west), Epsom (6 miles north), Horley (7 miles south-east), Redhill (5 miles east) and Ewell (7 miles north).
What’s near Box Hill
We work in homes and buildings around Brockham Limeworks and the streets around them. The nearest railway station is Betchworth station, roughly 0.8 miles east of the centre. A little further out are Headley Court (2.8 miles north) and Reigate Priory Museum (3.6 miles east). For a walk, there’s Colley Hill and Reigate Heath.
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a typical bath or shower, longer where several layers have been applied and we leave things clean and tidy. Somewhere like Box Hill needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking the joint for movement, leaks and the reason it failed.
- Every layer of old sealant is cut and cleaned out.
- Next, any mould is treated and the joint dried.
- Where the joint moves, backing and a flexible sealant suited to the movement go in.
- Finally we finish the joint and talk you through what we found.
How to prepare
- For business premises, tell us about site rules or sign-in
- Mention any parking rules near the property
- Mention if the joints have been sealed before
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand.
Advice
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Different surfaces, different methods
Over-sealed & botched joints
Previous removal attempts can leave scratches or gouges. We work carefully to avoid adding to it, and tell you about any damage we find.
Leaking trays & enclosures
Where the joints are the problem, every bead is stripped and resealed with anti-fungal sanitary silicone, tray edges and screen profiles included.
What affects the cost of remedial sealant
Call for a quick quote. The main things that affect it are:
- Any working-time requirements on site
- The old material and how stubborn it is
- The number of rooms or windows
- How easy the joints are to reach
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- If someone has resealed it before
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
Leave it or put it right?
Mould under a bead can’t be reached by cleaning. The layers have to come out, and the joint treated and dried before resealing. Older cottages and farmhouses around Box Hill can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Box Hill
- Colour agreed with you before any work starts
- We leave the area clean and tidy
- Experience in homes, commercial sites and hotels
- Approved under the ARBOMaster scheme
Take a look at what affects the cost and customer reviews.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Always have old sealant cut out, not covered
- Use a soft cloth, not a scourer, on silicone
- Keep an eye on the ceiling below the bathroom
- Run the fan after every shower
Where we have pointed out another fault, have it put right, because the new sealant cannot hold back a problem underneath.
If a joint has failed more than once, stop resealing it. Have someone find out why, or the next bead will go the same way.
Places near Box Hill
More services for Box Hill
FAQs for Box Hill
Is Box Hill in your area for remedial sealant?
Yes, Box Hill is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Do you cover smaller places like Box Hill?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is there any odour?
Some sealants have a smell while they cure. Opening a window helps.
Do you offer different sealant colours?
Most of the time, yes. We will explain which colours are available.
Can you remove sealant that’s been put over old sealant?
Yes. Stripping layered sealant takes longer than a normal reseal, but it’s what makes the new bead last.
What if the leak isn’t the sealant?
We’ll tell you. If it’s a cracked tray, a failed valve or a leaking waste, resealing will not fix it, and we will not reseal for the sake of it.
How much does remedial sealant cost in Box Hill?
Size, access and the old material all affect the cost. Ask us for a quote.
Can you do several jobs on one visit?
Yes, we can. More than one area can go on one quote.