West Sussex · England
Remedial Sealant in Colworth
Professional remedial sealant in and around Colworth, with old sealant always removed completely and a 12-month guarantee.
- Caulk or the wrong sealant used in a wet area
- Dark patches showing through the sealant
- Over-sealed joints coming away
About our remedial sealant in Colworth
If a joint has been resealed and is leaking again, it’s worth a proper look. It helps to have photos when you call 0345 464 0079 or email us, and say how long ago it was last done. Typical jobs include a shower that leaks however often it’s resealed and caulk or the wrong sealant used in a wet area, on failed movement joints, expansion joints and mouldy bath & shower sealant.
Somewhere as small as Colworth, homes tend to be cottages, farmhouses or converted buildings, with some newer houses too. Older walls and timber floors can move a little, and cracked grout and split sealant are often the first signs.
Our work is backed for twelve months, in Colworth and everywhere else we cover.
- Place
- Colworth (PO20)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
On the day, we look over the joints with you first. Surfaces next to the work are protected before we start. Most jobs take a few hours for most joints, depending on how much old sealant has to come out. Somewhere as small as Colworth, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we work out whether the problem is the sealant, movement or a leak.
- Each layer is cut out and the residue cleaned off.
- Mould is treated and the joint dried.
- The right product goes in, with backing where the joint moves.
- We finish neatly and point out anything that needs another trade.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
- Clear items away from the joints we are working on
Getting 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, and we’ll come back to you with a quote.
Related advice
What remedial sealant looks like in Colworth
Colworth is within about 3 miles of the coast. Coastal homes, holiday lets and guest houses can see heavy bathroom use in busy months, which wears sealant and grout out faster than in a quiet home. Most of the South East has hard water, so limescale builds up on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
If you let a flat or house near Bognor Regis station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Colworth is about 2 miles north of Bognor Regis, in West Sussex. If you need remedial sealant in Colworth, please call 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover West Sussex. Colworth is one of 371 towns and villages in West Sussex where we work for remedial sealant. There’s also a page for Portsmouth, about 16 miles away.
Our applicators cover all of PO20 for remedial sealant. We also cover the places around Colworth: Merston (1 mile west), Oving (2 miles north-west), Lagness (2 miles south-west), Runcton (2 miles west) and Shopwyke (2 miles north-west). We also work in nearby towns such as Worthing (13 miles east), Chichester (4 miles north-west), Selsey (7 miles south-west), Littlehampton (8 miles east), Emsworth (10 miles west) and Rustington (9 miles east).
Landmarks near Colworth
In Colworth, that means homes and buildings near The Regis School and The Brooks Local Nature Reserve. The closest station to Colworth is Bognor Regis station, roughly 2.5 miles south-east of the centre. Well-known places in the area include Bognor Regis Museum (2.7 miles south-east) and Tote Copse Castle (1.3 miles north-east).
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Colworth questions
Do you work for landlords with property near Bognor Regis station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Is Colworth within the area you cover?
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.
Does remedial work come with a guarantee?
Yes, with our one-year guarantee. If we’ve pointed out another problem, getting it fixed helps the new joint last.
Can failed expansion joints be resealed?
Yes. We cut out the failed sealant, fit backing and reseal with a flexible product.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Someone sealed over the old bead. Can you fix it?
Yes. Stripping layered sealant takes longer than a normal reseal, but it’s what makes the new bead last.
Other services in Colworth
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Keep an eye on the ceiling below the bathroom
- Keep the room well ventilated
- Use a soft cloth, not a scourer, on silicone
- Find out why the sealant failed first
Clean gently: a mild cleaner and a soft cloth, with no blades or scourers.
Leaks through failed sealant grow over time. Every shower or downpour sends more water through, into whatever is behind or below. Early action keeps it to a sealant job.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Do you need remedial sealant in Colworth?
Even good sealant ages. Mould grows into the silicone, the surface hardens and the bead shrinks. At that point it has to come out.
People normally contact us after spotting one of these:
- Sealant that came away because the surface wasn’t prepared
- Mould trapped under a layer of silicone
- Repeat leaks from the same joint
- Wide, uneven beads that look worse than the old ones
If you look after a building such as Bartons Primary School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
Comparing quotes
- Whether they’re fully insured
- What product goes in the joint
- Whether you can choose the colour
- How much experience the applicator has
Surface by surface
Mouldy bath & shower sealant
Mould that has grown into silicone doesn’t clean out for good. The sealant is cut out completely, the joint treated with a mould remover and dried before anti-fungal sanitary silicone goes in.
Movement & expansion joints
A sealant stuck to the back of the joint cannot stretch. Backing stops that, letting the sealant flex between the two faces.
Leave it or put it right?
Hidden water does the most damage: soaked floorboards, ceiling stains below and blown plaster. By comparison, sorting the joint is quick. Older cottages and farmhouses around Colworth can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Why choose Mr Mastic in Colworth
- You choose the colour before work begins
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
- Sealant colour chosen to suit
Read what affects the cost or customer reviews.