West Sussex · England
Blackstone Remedial Sealant
Remedial sealant in Blackstone from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Sealant that came away because the surface wasn’t prepared
- Leaks that keep coming back after resealing
- Wide, uneven beads that look worse than the old ones
How we handle remedial sealant in Blackstone
Movement and expansion joints fail when the sealant can’t stretch. The old sealant comes out and backing goes in to control the depth, before resealing with a flexible product suited to the movement. We’re often asked to deal with caulk or the wrong sealant used in a wet area and mould trapped under a layer of silicone, across botched or over-sealed joints, expansion joints and shrunken worktop sealant.
For a small place like Blackstone, remedial sealant is planned like any other job: the journey and access are simply agreed in advance. In the bathroom or kitchen, the work is the same as in any town.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or send us an email.
- Location
- Blackstone (BN5)
- Region
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
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 fails, we can still redo it.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The process
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours for most joints, depending on how much old sealant has to come out. Somewhere like Blackstone needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking the joint for movement, leaks and the reason it failed.
- All the old sealant comes out, including any layers underneath.
- The joint is cleaned, treated for mould and left to dry.
- Where the joint moves, backing and a flexible sealant suited to the movement go in.
- We tool the joint and tell you about anything else that needs attention.
Before we arrive
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
Getting a quote
For remedial sealant in Blackstone, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Read more
Towns and villages near Blackstone
Also in Blackstone
What we’re called out for in Blackstone
Joints that move need sealant that can stretch. A bath that flexes, a tray that rocks or a building joint that opens and closes will split a rigid or thin bead.
Keep an eye out for any of the following:
- Dark patches showing through the sealant
- Leaks that keep coming back after resealing
- Floor or wall movement joints that have failed
- Decorators’ caulk around a bath or shower
If you let a flat or house near Hassocks station, a joint that keeps failing is best fixed properly while the property is empty.
What to look for in a quote
- What product goes in the joint
- When the joint can take water or movement
- Is the old sealant removed completely?
- What preparation is included
Blackstone homes and their sealant
Hard water is the norm across most of the South East, so limescale builds up on sealant, grout and fittings.
Homes close to The Parish Church of St Bartholomew include some older properties, and timber floors under older bathrooms flex, so joints need a sealant that moves with them.
Blackstone is about 5 miles west of Burgess Hill, in West Sussex. Anywhere in BN5, we cover remedial sealant for homes and businesses. 371 places in West Sussex are on our list. There’s also a page for Brighton, roughly 8 miles from Blackstone.
Every address in BN5 is covered for remedial sealant, from the main roads to the quietest streets. We cover properties on Blackstone Lane and Blackstone Street and the roads around them. Close by, we work in Woodmancote (1 mile south-west), High Cross (1 mile north-east), Albourne (1 mile east), Albourne Street (1 mile east) and Albourne Green (1 mile east). Within a short drive, we also cover Crawley (13 miles north), Horsham (10 miles north), Worthing (10 miles south-west), Haywards Heath (8 miles north-east), Burgess Hill (5 miles east) and Littlehampton (15 miles south-west).
Near you in Blackstone
For rail, the closest station is Hassocks station, about 3.9 miles east. Other landmarks nearby include The Dene Hospital (3.8 miles north-east) and The Budding Foundation Museum of Gardening (3.6 miles east). Open spaces near Blackstone include Woods Mill and Wolstonbury Hill.
What happens if it’s left?
Remedial work takes longer than a straight reseal, but not by much: the work takes a few hours, depending on how many layers have to come out. It’s far less disruption than resealing the same joint again and again. Where a wall is exposed, as many are in small places like Blackstone, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What you get with us
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
- Full insurance on every job
- A sealant colour to suit the surroundings
Your questions about remedial sealant in Blackstone
Can you help a landlord with a rental near Hassocks station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Can you do remedial sealant in Blackstone?
Yes, Blackstone is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
Someone sealed over the old bead. Can you fix it?
Yes. We cut out all the layers and clean off the film, then the joint is resealed once.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Are you insured?
Yes. We are fully insured.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Surface by surface
Windows & doors
Frames resealed over the top end up with hard, layered mastic. All of it is cut out and the frame and wall cleaned before backing and resealing.
Over-sealed & botched joints
A thick bead smeared across tiles often hides mould or gaps. Taking it back shows what’s underneath.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Keep movement joints clear of mortar and paint
- Run the fan after every shower
- Check trays and worktops don’t move
- Use a soft cloth, not a scourer, on silicone
Watch the joint over the first few weeks, especially if movement was the problem. Should anything change, phone 0345 464 0079 or drop us an email.
Warning signs: sealant lifting at the ends, a second bead visible on top of the first, black mould under the silicone, or stains below a bathroom. Each one is worth getting looked at.
What sealant work can’t fix
We’ll always be straight with you, so here’s what new sealant will not do:
- Tiles that have come away from the wall
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- A tray or bath that is cracked
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Expansion joints
- Shrunken worktop sealant
- Botched or over-sealed joints
- Failed movement joints