Hertfordshire · England
Remedial Sealant in Coleman Green
Remedial sealant for Coleman Green, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Sealant that came away because the surface wasn’t prepared
- Kitchen joints letting water behind the worktop
- Caulk or the wrong sealant used in a wet area
How we handle remedial sealant in Coleman Green
Decorators’ caulk in a shower, bathroom silicone on a window, a rigid filler in a movement joint will not last, however tidy it looks. We take it out and use a sealant made for that joint. We’re often asked to deal with caulk or the wrong sealant used in a wet area and smears and lumps from a botched reseal, across failed movement joints, shrunken worktop sealant and mouldy bath & shower sealant.
Being in a small place like Coleman Green makes no difference to the job itself: the journey and access are simply agreed in advance. Once we’re there, the bathroom or kitchen gets the same care as anywhere else.
All our work is covered by a one-year guarantee.
- Location
- Coleman Green (AL4)
- Region
- Hertfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Why act early in Coleman Green
Adding more sealant is the usual quick fix, and it rarely works. It does not grip the old layer, leaving the leak in place and one more layer to cut out later. Older cottages and farmhouses around Coleman Green can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on how much there is to do, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Why choose Mr Mastic in Coleman Green
- Domestic, commercial and hotel work
- A sealant colour to suit the surroundings
- Quality sealants from Arbo and Everbuild
- Anti-fungal silicone where joints get wet
See our cost guide and what customers say.
Coleman Green homes and their sealant
Most of the South East has hard water, which leaves limescale on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
Schools such as Beech Hyde Primary School and Nursery are buildings too, and 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.
Coleman Green is about 3 miles north-west of Hatfield, in Hertfordshire. Every kind of property in Coleman Green can book us for remedial sealant, old or new, large or small. The work is guaranteed for a year. 381 places in Hertfordshire are on our list, from the larger towns to small villages. We also work in London, about 22 miles from Coleman Green.
Work in AL4 works the same way as everywhere else we cover. That includes homes and businesses on Coleman Green Lane and Darblay Close. Neighbouring places we cover for remedial sealant include Cooper's Green (2 miles south), Lemsford (2 miles east), Jersey Farm (2 miles south-west), Stanborough (2 miles east) and Smallford (3 miles south). Larger places within reach include Watford (11 miles south-west), Hemel Hempstead (8 miles west), Stevenage (9 miles north-east), St Albans (4 miles south-west), Welwyn Garden City (4 miles east) and Harpenden (3 miles north-west).
Landmarks near Coleman Green
Typical jobs here are in homes near Sandringham School and John Bunyan pub, among other places. For rail, the closest station is Welwyn Garden City station, roughly 3.1 miles east of the centre. Nearby you will also find Howard Centre (3.1 miles east) and The Bunker at Hatfield Police Station (2.8 miles south-east). For a walk, there’s Wheathampstead Local Nature Reserve and Verulamium Lake.
Nearby places to Coleman Green
Also in Coleman Green
What happens on the day
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and clear up. Most jobs take a few hours, depending on how many layers have to come out. Somewhere as small as Coleman Green, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Surrounding tiles, trays and frames are protected first.
- Every layer of failed sealant is stripped out.
- We clean and degrease the joint and look for signs of movement or water.
- Once dry, a suitable sealant is applied and tooled.
- We give you the cure time and explain what caused the failure.
Getting ready for the visit
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
- Let us know if you’ve seen damp or leaks
Get a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved.
Advice
What affects the quote in Coleman Green
There’s no set price list. The quote depends on:
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- Whether the work is at height
- How many areas need sealing
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Asking for a quote
What to tell us when you ask for a quote:
- A few pictures by email, if you can
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
How the job changes by surface
Leaking trays & enclosures
If the tray is cracked, or the leak is from the valve or waste, sealant will not fix it. We say so rather than reseal.
Windows & doors
Smeared or badly matched mastic can be cut out and redone neatly, matched to the frame colour.
When something else is needed
We will not take on work that won’t last, so here’s what sealant can’t put right:
- A cracked shower tray or bath (that needs repair or replacing)
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- Sealant in an older building that needs testing for asbestos first
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before booking.
Where we work in Coleman Green
- Mouldy bath & shower sealant
- Expansion joints
- Botched or over-sealed joints
- Failed movement joints
- Shrunken worktop sealant
- Leaking tray & enclosure joints
Do you need remedial sealant in Coleman Green?
Using the wrong product is a common cause: acrylic caulk in a wet area, a general-purpose sealant on a moving joint, or an acetoxy silicone on natural stone or some metals. Each fails in its own way.
The problems people normally mention when they call are:
- Sealant applied over old sealant that has lifted
- Dark patches showing through the sealant
- Torn expansion joints
- Gaps opening along the back of the worktop
For landlords with property near Welwyn Garden City station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Comparing quotes
- What insurance they hold
- What product goes in the joint
- Whether you can choose the colour
- Whether VAT is included
Your questions about remedial sealant in Coleman Green
Will you come out to Coleman Green?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Coleman Green for remedial sealant?
Yes, Coleman Green is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
How do I get a quote for remedial sealant in Coleman Green?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
How long will it take to strip and reseal the joint?
Longer than a simple reseal, because every layer has to come out. For most joints, it’s a few hours, and we confirm the time with your quote.
Can you remove old sealant without damaging the bath?
Yes. We cut and lift the old sealant with tools suited to the surface, and the residue is cleaned away. Any existing damage is pointed out before we start.
Do you work for landlords and businesses?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels in Coleman Green.
Can you take off two layers of silicone?
Yes. We remove every layer; new silicone does not bond to old silicone, which is why over-sealing fails.