Hertfordshire · England
Remedial sealant & repairs in Thorley, Hertfordshire
We cover Thorley for removing failed, mouldy or leaking sealant and putting it right. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Smears and lumps from a botched reseal
- Sealant applied over old sealant that has lifted
- Dark patches showing through the sealant
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Keep the room well ventilated
- Do not wait for a small gap to become a leak
- Keep an eye on the ceiling below the bathroom
- Do not add new sealant on top of old
Don’t let anyone seal over it later. New silicone does not bond to old, so the old bead should always come out first.
Don’t keep resealing the same joint. Get the cause found first, or the next bead will go the same way.
Remedial sealant in Thorley, done properly
With more than 20 years’ experience, our applicators have seen most of the ways sealant can fail. We are ARBOMaster approved and fully insured, and remedial work carries our one-year guarantee. We work on failed movement joints, shrunken worktop sealant and expansion joints, and common reasons people get in touch are torn expansion joints and worktop sealant that has shrunk and split.
Being in a small place like Thorley makes no difference to the job itself: it just means planning the journey and access beforehand. Once we are there, the bathroom or kitchen gets the same care as anywhere else.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- Thorley (CM23)
- Region
- Hertfordshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Thorley
Can you do remedial sealant in Thorley?
Yes. We work across London and the South East, and Thorley is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
Will you come out to Thorley?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What if the leak is not the sealant?
That’s why we look for the cause first. If we find the leak is elsewhere, we tell you before going further.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
Do you remove the old sealant?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Do you have insurance?
Yes. We’re fully insured.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Why deal with it now?
Another bead over the top will not fix a failed joint. It cannot bond to what’s underneath, leaving the leak in place and one more layer to cut out later. Older cottages and farmhouses around Thorley can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
Why choose Mr Mastic in Thorley
- Quality sealants from Arbo and Everbuild
- Experience in homes, commercial sites and hotels
- 4.9 on Google from 180+ five-star reviews
- We never seal over old sealant
What we do, step by step
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours for most joints, depending on how much old sealant has to come out, depending on the size of the job. Somewhere as small as Thorley, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- The failure is looked at first, so we know whether it’s sealant, movement or water from elsewhere.
- Each layer is cut out and the residue cleaned off.
- We treat any mould and dry the joint thoroughly.
- We reseal with a product suited to the joint, backed where needed.
- We finish neatly and point out anything that needs another trade.
How to prepare
- Let us know if you’ve seen damp or leaks
- Let us know about stairs, lifts or work at height
- On commercial sites, let us know about site rules
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Related advice
Signs you need remedial sealant in Thorley
A lot of failed joints have been sealed over rather than replaced. Silicone doesn’t bond to silicone, so the new layer peels, and damp and mould settle between them.
The most common problems we see are:
- Decorators’ caulk around a bath or shower
- Torn expansion joints
- Over-sealed joints coming away
- Black mould underneath the bead
If you live in an older home near Parish Church of St James the Great, walls and floors in older homes can move, and sealant and grout show it first.
Before you book anyone
- Are they insured?
- Whether the sealant suits the joint
- What the cure time is
- How the joint is cleaned and prepared
Remedial sealant around Thorley
Hard water is the norm across most of the South East, which leaves limescale on sealant, grout and fittings.
If you look after a building such as Richard Whittington Primary School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s. Letting a property close to Bishops Stortford station? Then failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Thorley is about 1 mile south-west of Bishop's Stortford, in Hertfordshire. From the centre of Thorley to the outskirts, we cover remedial sealant for every kind of property, from flats and houses to offices and hotels. Our Hertfordshire coverage runs to 381 places, and Thorley is one of them. You can also see our page for Chelmsford, roughly 17 miles from Thorley.
Jobs for remedial sealant in CM23 works the same way as everywhere else we cover. We also cover the places around Thorley: Thorley Street (1 mile east), Spellbrook (1 mile south-east), Bishop's Stortford (1 mile north-east), Little Hallingbury (2 miles south-east) and Allen's Green (2 miles south-west). We also work in nearby towns such as Stevenage (14 miles west), Welwyn Garden City (15 miles west), Hoddesdon (9 miles south-west), Cheshunt (13 miles south-west), Hertford (10 miles west) and Ware (8 miles west).
Landmarks near Thorley
In Thorley, that means homes and buildings near Coach And Horses Public House and The Bishop's Stortford High School. The nearest railway station is Bishops Stortford station, roughly 1.5 miles north-east. Other landmarks nearby include Bishops Stortford Local History Museum (2.4 miles north) and Moated mound (3 miles north-west). For a walk, there’s Portingbury Hills and Thorley Wash nature reserve.
What the job involves on each surface
Leaking trays & enclosures
A cracked tray, failed valve or leaking waste needs a different fix. We will tell you what we find.
Movement & expansion joints
A movement joint must be able to stretch. We remove the failed sealant, fit backing and reseal with a low-modulus product.
Also near Thorley
Also in Thorley
What sealant work cannot fix
To be straight with you, there are a few things sealant will not fix:
- Sealant in an older building that needs testing for asbestos first
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- A tray or worktop that needs refixing first
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before you book.
Surfaces we seal
- Expansion joints
- Shrunken worktop sealant
- Failed movement joints
- Leaking tray & enclosure joints
- Botched or over-sealed joints
- Mouldy bath & shower sealant
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.